Part 1 Advanced Problems (1.5th) and Part 2 Same-Car Student Summary Problems

Chapter 4 Corporate Tax Law
Section 1 General Provisions and Calculation Structure of Corporate Tax - 4-3
◈ Question 1-1.
Tax Adjustment 4-3

Section 2 Income Disposition - 4-8
◈ Question 2-1.
Income Disposition 4-8
◈ Question 2-2.
Tax Adjustment Methods and Income Disposition 4-11
◈ Question 2-3.
Income Disposition - Fines and Income Tax Advance Payment Amount 4-15
◈ Question 2-4.
Corporate Tax Calculation Structure - Post-Management of Income Disposition and Retention 4-18

Section 3 Profit and Loss Deduction (I) - 4-25
◈ Question 3-1.
Purchase of assets 4-25
◈ Question 3-2.
Valuation gains and losses on assets and treasury stock 4-29
◈ Question 3-3.
Refund amount (refund) 4-34
◈ Question 3-4.
Gains on Asset Acquisition and Debt Forgiveness 4-37
◈ Question 3-5.
Amount exceeding par value of stock issuance and debt forgiveness gains from conversion of equity into capital 4-42
◈ Question 3-6.
Comprehensive exchange gains and transfer gains on stocks, income distributed from partnerships 4-45
◈ Question 3-7.
Deemed rent 4-47
◈ Question 3-8.
Deemed rent 4-50
◈ Question 3-9.
Earnings - Comprehensive Problem 4-53

Section 4 Profit and Profit Exclusion (II) - Profit Exclusion and Statutory Dividends for Dividends - 4-57
◈ Question 4-1.
Non-deduction of dividend income from income 4-57
◈ Question 4-2.
Non-deduction of dividend income from income 4-61
◈ Question 4-3.
Exclusion of Dividends from Income - Comprehensive Problem 4-65
◈ Question 4-4.
Non-deduction of dividend income from income 4-68
◈ Question 4-5.
Non-deduction of dividend income from income 4-70
◈ Question 4-6.
Non-deduction of foreign subsidiary dividend income from income 4-73
◈ Question 4-7.
Comprehensive Stock-Related Problems 4-77
◈ Question 4-8.
Agenda Dividend - Waiver of Treasury Stock Allocation 4-81
◈ Question 4-9.
Reduction of capital reserves 4-87
◈ Question 4-10.
4-91 Distribution of dividends due to dissolution or merger
◈ Question 4-11.
Potato 4-95
◈ Question 4-12.
Potato - Practice Problem 4-100
◈ Question 4-13.
Potato - Practice Problem 4-104
◈ Question 4-14.
Debt-forgiveness gains from conversion of equity capital, dividends, and capital reduction - Comprehensive Problem 4-108
◈ Question 4-15.
grace
4-111

Section 5: Deductions and Exclusions from Deductions - 4-112
◈ Question 5-1.
Labor costs 4-112
◈ Question 5-2.
Labor Costs - Practice Problem 4-118
◈ Question 5-3.
Labor costs 4-121
◈ Question 5-4.
Stock Purchase Option - Cash Settlement 4-124
◈ Question 5-5.
Stock Purchase Option - New Share Allocation and Treasury Share Allocation - Practice Problem 4-127
◈ Question 5-6.
Taxes and utility charges, etc. 4-131
◈ Question 5-7.
Taxes, Utility Bills, etc. - Application Problem 4-134
◈ Question 5-8.
Travel expenses, training expenses, damages, etc. 4-139
◈ Question 5-9.
Joint Security 4-142
◈ Question 5-10.
Value Added Tax 4-145
◈ Question 5-11.
Business passenger car 4-150
◈ Question 5-12.
Business passenger vehicle 4-156
◈ Question 5-13.
Business Vehicles - Practice Problem 4-159
◈ Question 5-14.
Hand Geum - Comprehensive Problem 4-165

Section 6: Timing of Profit and Loss Attribution - 4-168
◈ Question 6-1.
Sales-related adjustments and their impact 4-168
◈ Question 6-2.
General sales profit and loss of assets 4-170
◈ Question 6-3.
Consignment Sales 4-173
◈ Question 6-4.
Installment sales profit and loss 4-175
◈ Question 6-5.
Installment sales profit and loss 4-177
◈ Question 6-6.
Installment Sales Profit and Loss - Practice Problem 4-182
◈ Question 6-7.
Installment Sales Profit and Loss - Practice Problem 4-188
◈ Question 6-8.
Contracted construction profit and loss 4-192
◈ Question 6-9.
Profit and Loss of Contract Construction - Practice Problem 4-194
◈ Question 6-10.
Profit and Loss of Contract Construction - Practice Problem 4-197
◈ Question 6-11.
Self-employed construction profit and loss 4－200
◈ Question 6-12.
Interest earned and paid 4-204
◈ Question 6-13.
Dividend Income 4-209
◈ Question 6-14.
Rent 4-211
◈ Question 6-15.
Discount on Private Bonds Issued and Other Profits and Losses 4-213
◈ Question 6-16.
Refundable Debt, Contractual Debt, Sales Subject to Return, Convertible Bonds 4-215

Section 7 Acquisition cost of assets - 4-220
◈ Question 7-1.
Acquisition cost of assets - Inventory assets 4-220
◈ Question 7-2.
Acquisition Cost of Assets - Tangible and Intangible Assets 4-223
◈ Question 7-3.
Acquisition Cost of Assets - Tangible and Intangible Assets 4-226
◈ Question 7-4.
Acquisition price of assets - marketable securities 4-228
◈ Question 7-5.
Acquisition price of assets - marketable securities 4-231
◈ Question 7-6.
Acquisition price of assets - marketable securities 4-234
◈ Question 7-7.
Present Value Assessment 4-238

Section 8 Valuation of Inventory Assets, Marketable Securities, and Foreign Currency Assets and Liabilities - 4-243
◈ Question 8-1.
Valuation of Inventory Assets 4-243
◈ Question 8-2.
Valuation of Inventory Assets - Practice Problem 4-247
◈ Question 8-3.
Valuation of Inventory Assets 4-251
◈ Question 8-4.
Valuation of Inventory Assets 4-255
◈ Question 8-5.
Valuation of Securities - Stocks 4-257
◈ Question 8-6.
Valuation of Securities - Bonds 4-262
◈ Question 8-7.
Valuation of Foreign Currency Assets and Liabilities 4-265

Section 9 Depreciation Expenses - 4-268
◈ Question 9-1.
Step 1: Calculating Depreciation Expenses on Company Accounts 4-268
◈ Question 9-2.
Step 1: Calculating Depreciation Expenses on Company Accounts 4-274
◈ Question 9-3.
Step 2: Calculating the Depreciation Range 4-277
◈ Question 9-4.
Step 2: Calculating the Depreciation Range 4-280
◈ Question 9-5.
Step 2: Calculating the Depreciation Range 4-283
◈ Question 9-6.
Calculation of Depreciation Denial 4-287
◈ Question 9-7.
Calculation of Depreciation Denial 4-289
◈ Question 9-8.
Calculation of Depreciation Denial 4-292
◈ Question 9-9.
Development cost 4-295
◈ Questions 9-10.
Donated assets with income earned 4-301
◈ Question 9-11.
Contents Year 4-304
◈ Questions 9-12.
Loss on disposal of transferred assets and production facilities 4-307
◈ Question 9-13.
Change in Depreciation Method 4-310
◈ Question 9-14.
Depreciation Agenda 4-314
◈ Question 9-15.
Depreciation Agenda - Practice Problem 4-317
◈ Question 9-16.
Special Provisions for Reporting Adjustments for Corporations Adopting Korean International Financial Reporting Standards 4-320
◈ Question 9-17.
4-326 Appraisal Certificate and Depreciation Denial by Law

Section 10 Non-deduction of interest paid - 4-328
◈ Question 10-1.
Order of exclusion of interest payments from deductions 4-328
◈ Question 10-2.
Construction Fund Interest 4-331
◈ Question 10-3.
Construction Fund Interest 4-334
◈ Question 10-4.
Construction Fund Interest 4-339
◈ Question 10-5.
Interest paid on business-unrelated assets 4-341
◈ Question 10-6.
Interest paid on business-unrelated assets 4-346

Section 11 Corporate Business Promotion Expenses - 4-349
◈ Question 11-1.
Corporate business promotion expenses 4-349
◈ Question 11-2.
Corporate business promotion expenses 4-356
◈ Question 11-3.
Calculation of income amount and limit amount 4-360
◈ Question 11-4.
Calculation of Import Amount and Limit 4-366
◈ Question 11-5.
Corporate Business Expenses and Revenue - Practice Problem 4-369
◈ Question 11-6.
Asset Accounting Corporate Business Promotion Expenses 4-374
◈ Question 11-7.
Asset Accounting Corporate Business Expenses - Comprehensive Practice Problem 4-378
◈ Question 11-8.
Correction of errors in corporate business expenses 4-382

Section 12 Donations - 4-386
◈ Question 12-1.
Tax Adjustment Structure for Donations 4-386
◈ Question 12-2.
Profit and Loss Attribution Period of Donations 4-388
◈ Question 12-3.
In-kind donation 4-393
◈ Question 12-4.
Agenda Donation 4-399
◈ Question 12-5.
Donation 4-404
◈ Question 12-6.
Donations - Practice Problem 4-406
◈ Question 12-7.
Donation - Practice Problem 4-410
◈ Question 12-8.
Bug Fix 4-415
◈ Question 12-9.
Error Correction - Practice Problem 4-419

Section 13: Retirement Benefit Reserves and Retirement Pension Reserves - 4-421
◈ Question 13-1.
Severance Pay Reserve Fund - Establishment and Offset 4-421
◈ Question 13-2.
Severance Pay Reserve Fund 4-425
◈ Question 13-3.
Severance Pay Reserve Fund 4-427
◈ Question 13-4.
Transfer of Specially Related Corporations 4-431
◈ Question 13-5.
Interim Settlement of Merger and Retirement Benefits 4-433
◈ Question 13-6.
Defined Contribution Pension Plan 4-436
◈ Question 13-7.
Severance Pay Reserve and Retirement Pension Reserve 4-438
◈ Question 13-8.
Severance Pay Reserve and Retirement Pension Reserve 4-446

Section 14: Allowance for Bad Debt - 4-451
◈ Question 14-1.
Tax Adjustment Structure for Bad Debt Allowance 4-451
◈ Question 14-2.
Recovery of Bad Debt 4-458
◈ Question 14-3.
Approval of Reserve Funds 4-461
◈ Question 14-4.
Tax Adjustment Related to Bad Debt 4-465
◈ Question 14-5.
Tax Adjustment Related to Bad Debt 4-469
◈ Question 14-6.
Excess amount of allowance for bad debts - Receivables subject to provision 4-474
◈ Question 14-7.
Bad debt reserve 4-478
◈ Question 14-8.
Adjustment of Receivables and Debts and Allowance for Bad Debt 4-482
◈ Question 14-9.
Bad Debt Provisions - Practice Problem 4-485
◈ Question 14-10.
Bad Debt Provisions - Practice Problem 4-489
◈ Question 14-11.
Bad Debt Provisions - Practice Problem 4-493

Section 15 Other Reserves and Provisions - 4-495
◈ Question 15-1.
Insurance profit 4-495
◈ Question 15-2.
National Treasury Subsidies - Asset Deduction Act 4-500
◈ Question 15-3.
Government Subsidies - Deferred Revenue Method 4-504
◈ Question 15-4.
Special Purpose Business Reserve Fund 4-507

Section 16 Denial of Unfair Act Calculation (1) - 4-511
◈ Question 16-1.
Cigar Evaluation Method 4-511
◈ Question 16-2.
High-price purchase and low-price transfer 4-517
◈ Question 16-3.
High-Price Purchase and Low-Price Transfer - Denial of Unfair Act Calculation and Donation 4-520
◈ Question 16-4.
High-price purchase - nonpayment of price 4-524
◈ Question 16-5.
In recognition interest 4-527
◈ Question 16-6.
In recognition interest 4-532
◈ Question 16-7.
In recognition interest 4-536
◈ Question 16-8.
Recognition - Practice Problem 4-541
◈ Question 16-9.
Denial of Unfair Act Calculation - Practice Problem 4-543

Section 17: Denial of Unfair Acts (2) - Unfair Capital Transactions - 4-548
◈ Question 17-1.
Unfair Merger 4-548
◈ Question 17-2.
Unfair Mergers - Practice Problem 4-553
◈ Question 17-3.
Unfair Capital Increase 4-558
◈ Question 17-4.
Unfair Capital Increase - Practice Problem 4-563
◈ Question 17-5.
Unfair Capital Increase 4-568
◈ Question 17-6.
Unfair Capital Increase - Practice Problem 4-573
◈ Question 17-7.
Unfair Potato 4-576
◈ Question 17-8.
Unfair Potatoes - Practice Problem 4-579

Section 18 Tax Base and Calculated Tax Amount - 4-585
◈ Question 18-1.
Calculation of Tax Base 4-585
◈ Question 18-2.
Calculation of Tax Amount 4-588
◈ Question 18-3.
Retroactive Deduction for Deficit 4-591
◈ Question 18-4.
Retroactive Deduction of Deficit - Practice Problem 4-595
◈ Question 18-5.
Retroactive Deduction of Deficit - Practice Problem 4-599
◈ Question 18-6.
Retroactive Deduction of Deficits - Practice-Based Comprehensive Problem 4-603

Section 19 Calculation of Corporate Tax Deductions and Payments - 4-606
◈ Question 19-1.
The Impact of Withholding Tax on Corporate Tax Calculations 4-606
◈ Question 19-2.
Tax deduction amount - 4-609 before minimum tax consideration
◈ Question 19-3.
Foreign Tax Credit and Exclusion of Dividends from Foreign Subsidiaries from Income 4-613
◈ Question 19-4.
Foreign Tax Credit and Exclusion of Dividends from Foreign Subsidiaries from Income - Practice Problem 4-617
◈ Question 19-5.
Foreign Tax Credit and Exclusion of Dividends from Foreign Subsidiaries from Income - Practice Problem 4-622
◈ Question 19-6.
Disaster Loss Tax Credit 4-626
◈ Question 19-7.
Tax deduction due to correction of accounting errors 4-629
◈ Question 19-8.
Research and Human Resources Development Tax Credit 4-632
◈ Question 19-9.
Special Tax Reduction for Small and Medium Enterprises, Integrated Investment Tax Credit 4-635
◈ Question 19-10.
Minimum Tax - Calculation Structure 4-638
◈ Question 19-11.
Minimum tax 4-643
◈ Question 19-12.
Minimum tax 4-648
◈ Question 19-13.
Minimum tax 4-650
◈ Question 19-14.
Minimum Tax - Practice Problem 4-653
◈ Question 19-15.
Minimum Tax - Practice Problem 4-657
◈ Question 19-16.
Minimum Tax - Interim Tax Amount - Practice Problem 4-661
◈ Question 19-17.
Minimum Tax - Interim Tax Amount - Practice Problem 4-666
◈ Question 19-18.
Surtax 4-669
◈ Question 19-19.
Surtax 4-671
◈ Questions 19-20.
Surtax - Practice Problem 4-674
◈ Questions 19-21.
Comprehensive Problem 4-676

Section 20: Corporate Tax on Land Transfer Income, Unrepatriated Income, and Liquidation Income - 4-681
◈ Question 20-1.
Corporate tax on land transfer income, etc. 4-681
◈ Question 20-2.
Corporate Tax on Unrepatriated Income 4-684
◈ Question 20-3.
Corporate Tax on Liquidation Income 4-690
◈ Question 20-4.
Corporate Tax on Liquidation Income 4-693

Section 21 Special Provisions Regarding Mergers, Divisions, etc. - 4-697
◈ Question 21-1.
Merger Tax System 4-697
◈ Question 21-2.
Capital Gains and Losses and Presumptive Dividends 4-704
◈ Question 21-3.
Qualified and Unqualified Mergers 4-707
◈ Question 21-4.
Comprehensive Problem 4-711
◈ Question 21-5.
Capitalization of Merger Gains 4-717
◈ Question 21-6.
4-721 in case of merger and consolidation stocks
◈ Question 21-7.
4-725 in case of merger and consolidation stocks
◈ Question 21-8.
Personal Division Tax System 4-731
◈ Question 21-9.
Physical Division Tax System 4-734
◈ Question 21-10.
Comprehensive Problem 4-737

Section 22 Consolidated Tax System - 4-741
◈ Question 22-1.
Consolidated Tax System 4-741
◈ Question 22-2.
Consolidated Tax System - Practice Problem 4-746
◈ Question 22-3.
Consolidated Tax System - Practice Problem 4-750
◈ Question 22-4.
Calculation of Individual Consolidated Income Amount 4-754

Part 2: The Problem of Deferred Action Students

Chapter 4 Corporate Tax Law
◈ Corporate deferral 1.
Corporate Income Disposition Delay - 3
◈ Corporate deferral 2.
Corporate deferral of asset purchase/transfer - 5
◈ Corporate deferral 3.
Corporate deferral of refund and loss reserve -8
◈ Corporate deferral 4.
Corporate deferral of deemed rent - 10
◈ Corporate deferral 5.
Corporate deferral of deemed rent - 11
◈ Corporate deferral 6.
Reference Issue - Deemed Rent (Complete Form No. 18) Corporate Deferral - 16
◈ Corporate deferral 7.
Corporate deferral of non-deduction of dividend income from income - 19
◈ Corporate deferral 8.
Corporate deferral of dividend income exclusion from income - 23
◈ Corporate deferral 9.
Corporate dividend deferral - 25
◈ Corporate deferral 10.
Corporate dividend deferral - 27
◈ Corporate deferral 11.
Corporate dividend deferral - 29
◈ Corporate deferral 12.
Corporate dividend deferral - 31
◈ Corporate deferral 13.
Corporate deferral of dividend payments, capital reserve reductions, etc. - 34
◈ Corporate deferral 14.
Corporate deferral of personnel expenses, etc. - 41
◈ Corporate deferral 15.
Corporate deferral of personnel expenses - 43
◈ Corporate deferral 16.
Joint Security Corporation Suspension-45
◈ Corporate deferral 17.
Corporate exemption for business-use passenger vehicles - 47
◈ Corporate deferral 18.
Consignment Sales Corporation Suspension-51
◈ Corporate suspension 19.
Installment Sales Corporation Deferral - 52
◈ Corporate deferral 20.
Contract work corporation suspension - 55
◈ Corporate deferral 21.
Self-employed Corporation Corporation Suspension-57
◈ Corporate deferral 22.
Real Estate Rental Business Corporation Delayed - 59
◈ Corporate deferral 23.
Conditional Return Sales Corporation Suspension-62
◈ Corporate deferral 24.
Convertible Bond Corporate Deferral - 66
◈ Corporate deferral 25.
Bulk Purchase Corporation Deferral - 69
◈ Corporate deferral 26.
Acquisition cost corporate deferral - 72
◈ Corporate deferral 27.
Corporate deferral of inventory assets - 75
◈ Corporate deferral 28.
Corporate deferral of inventory assets - 77
◈ Corporate deferral 29.
Securities Corporation Delayed Registration - 80
◈ Corporate deferral 30.
Securities Corporation Delayed Registration - 83
◈ Corporate deferral 31.
Foreign currency valuation and repayment corporate deferral - 86
◈ Corporate deferral 32.
Corporate Depreciation Deferral - 88
◈ Corporate deferral 33.
Corporate Depreciation Deferral-91
◈ Corporate deferral 34.
Corporate Depreciation Deferral - 95
◈ Corporate deferral 35.
Corporate Depreciation Deferral - 98
◈ Corporate deferral 36.
Corporate Depreciation Deferral - 101
◈ Corporate deferral 37.
Corporate Depreciation Deferral - 104
◈ Corporate deferral 38.
Corporate Depreciation Deferral - 107
◈ Corporate deferral 39.
Corporate Depreciation Deferral - 110
◈ Corporate deferral 40.
Construction Fund Interest Corporate Deferral - 112
◈ Corporate deferral 41.
Corporate deferral of interest on business-unrelated assets - 116
◈ Corporate deferral 42.
Comprehensive Problem Corporate Deferral - 119
◈ Corporate deferral 43.
Corporate business promotion expenses deferral - 123
◈ Corporate deferral 44.
Corporate business promotion expenses deferral - 128
◈ Corporate deferral 45.
Corporate donation deferral - 132
◈ Corporate deferral 46.
Corporate donation deferral - 134
◈ Corporate deferral 47.
Corporate donation deferral - 137
◈ Corporate deferral 48.
Corporate Deferral of Severance Pay Reserve Funds - 142
◈ Corporate deferral 49.
Corporate Deferral of Severance Pay Reserve Funds - 144
◈ Corporate deferral 50.
Corporate Deferral of Severance Pay Reserve Funds - 147
◈ Corporate deferral 51.
Corporate Deferral of Severance Pay Reserve Funds - 148
◈ Corporate deferral 52.
Corporate Deferral of Retirement Pension Funds - 151
◈ Corporate deferral 53.
Corporate Deferral of Bad Debt Reserves - 153
◈ Corporate deferral 54.
Corporate Deferral of Bad Debt Reserves - 156
◈ Corporate deferral 55.
Corporate Deferral of Bad Debt Allowance - 159
◈ Corporate deferral 56.
Corporate Deferral of Bad Debt Reserves - 163
◈ Corporate deferral 57.
Corporate Deferral of Bad Debt Reserves - 166
◈ Corporate deferral 58.
Temporary depreciation allowance for corporations - 170
◈ Corporate deferral 59.
Corporate suspension of denial of unfair calculation - 172
◈ Corporate deferral 60.
Corporate suspension of denial of unfair calculation - 174
◈ Corporate deferral 61.
Corporate suspension of denial of unfair calculation - 179
◈ Corporate deferral 62.
Corporate suspension of denial of unfair calculation - 182
◈ Corporate deferral 63.
Corporate suspension of denial of unfair calculation - 186
◈ Corporate deferral 64.
Corporate suspension of denial of unfair calculation - 192
◈ Corporate deferral 65.
Foreign Tax Credit Corporate Deferral - 197
◈ Corporate deferral 66.
Research and Human Resources Development Tax Credit Corporate Deferral - 200
◈ Corporate deferral 67.
Separate accounting corporation exemption - 202
◈ Corporate deferral 68.
Comprehensive Problem Corporate Deferral - 205
◈ Corporate deferral 69.
Comprehensive Problem Corporate Deferral - 210
◈ Corporate deferral 70.
Comprehensive Problem Corporate Deferral - 214
◈ Corporate deferral 71.
Corporate Tax Deferral on Unrepatriated Income - 218
◈ Corporate deferral 72.
Merger Corporation Postponement - 222
◈ Corporate deferral 73.
Merger Corporation Postponement - 225
◈ Corporate deferral 74.
Suspension of Physical Division of Corporations - 229
◈ Corporate deferral 75.
Merger - Comprehensive Issues Corporate Deferral - 232
◈ Corporate deferral 76.
Connection - Comprehensive Problem Corporate Deferral - 239

Following 2023, the Tax Law Lecture Summary 1 and Summary 2 reached a combined 40,000 copies in 2024, and the 2024 Tax Accounting Practice also recorded overwhelming sales, demonstrating overwhelming support. We appreciate your support for the Summary and Tax Accounting textbooks and lectures. With the same dedication we received when we first started teaching, we will continue to strive to provide the best textbooks and lectures.

The features of this textbook are as follows:

1.
For each problem, we have explained it and linked to the SUMMARY page that contains the relevant information.

2.
For each problem, I have explained the approach to the problem and the summary of each material as if I was giving a lecture, and I have written a related SUMMARY page next to the explanation to make it easier to organize.
The 2025 edition also includes a summary of key points regarding value-added tax.

3.
We have made the distinction between Part 1 [Advanced Problems (1.5th) and 2nd Dongcha Student Summary Problems] and Part 2 (Probationary Student Problems) clearer, reflecting recent trends in exam questions so that Dongcha students with limited time can solve only Part 1.

Those who use the tax accounting practice can learn as follows depending on their situation.
① For those preparing from the first round: Focus on questions from the 1.5 round
② For those preparing for the driving test: Summary of the 1.5 and 2nd questions in Part 1.
Among them, essential problems must be organized (if possible, also organize the problems that are solved during class time)
③ Second-term deferral students: Organize the basics of Part 1 and organize the deferral issues of Part 2. If it is too much trouble, organize the essential deferral issues of Part 2.

4.
In the 2024 edition, we have supplemented and reflected the areas deemed lacking in each subject in the questions to make it a more purpose-appropriate textbook.

5.
We have tried to make the textbook easily accessible and convenient to use.
To help you see the forest for the trees by topic, we first asked questions to understand the overall structure of each section, and then we could delve into the details.
For each problem, I wrote in the following order: 1. Problem, 2. Summary, 3. Solution, and 4. Explanation. Parts that require additional study were covered separately as [Case Problems].
For each question, we've written a simple answer based on the calculations that would be required in an actual exam, and then provided detailed explanations of the answers in the commentary to improve readability.

I did my best, but I'm still afraid that there might be errors I missed, and I feel regretful that I couldn't have made a better book.
We promise to continue to improve on any shortcomings, and we welcome your advice and criticism.

I would like to express my gratitude to the publishing staff of Sam & Books, including President Lee Nak-gyu, Manager Hong Su-gi, Assistant Managers Kim Bo-yeong and Kim Yong-jae, and Supervisor Yoon Hyeon-gyeong, who worked hard on the publication of this book. I would also like to express my special thanks to CPAs Baek Seung-ho, Seo Jeong-woo, and Jo Dae-hyung for their meticulous assistance with proofreading.

I dedicate this book to my wife, Gyeong-suk, who has filled my life with unwavering love, my two sons, Ho-jin and Seong-jin, and my parents. I also dedicate this book to everyone who has loved it.
I will always do my best without losing my beginner's mind.

February 16, 2025
Author: Kang Kyung-tae