Answer:
The correct answer is option D.
Explanation:
Joan bought a business machine for $15,000.
She sold it for $12,800.
The total allowable depreciation is $8,500.
The depreciation actually taken on the tax returns totaled $8,000.
The book value of machine
= Original value - Allowable depreciation
= $15,000 - $8,500
= $6,500
Gain to Joan
= Selling price of machine - Book value of machine
= $12,800 - $6,500
= $6,300