Answer:
$1,800,402
Explanation:
Cost = $3,980,000
Lifespan = 9 yrs
Residual Value = $122,000
Depreciation per year = (Cost - Residual Value)/life
Depreciation per year = (3,980,000 - 122,000)/9
Depreciation per year = 3,858,000 / 9
Depreciation per year = $428,667
So, Tax saved = 40% of $428,667 = $171,467
Depreciation per year not considered = 3 yrs * $428,667 = (+)$1,286,001
Tax saved due to Depreciation = 3 yrs * $171,467 = (+)$514,401
So, retained earnings was understated by $1,286,001 + $514,401 = $1,800,402