Answer: See explanation
Explanation:
Based on the information given in the question, the increase or decrease in the retained earnings will be calculated as:
= (10,000,000 - 400,000) × 15% × $15
= 9,600,000 × 0.15 × 15
= 21,600,000
The retained earnings will decrease by $21.6 million
The options given aren't correct.