Answer:
Corrected income before tax year 2017 = $65,690 
Corrected income before tax year 2018 = $102,467
Step-by-step explanation:
According to the scenario, computation of the given data are as follow:- 
 
 Particular Year 2017 ($) Year 2018 ($) 
 Income before tax 101,000 84,100 
 Corrections 
1. In 2017, unearned sales -36,200 
 Sales added in 2018 36,200 
2. In 2017, understated ending inventory 9,500 
 In 2018, overstated opening inventory -9,500 
3. Add-wrongly charged interest expenses 13,800 13,800 
 Less-actual interest expenses 
 In 2017 ($230,000-$14,000)×7%=$216,000×7% -15,120 
 In 2018, bond of carrying amount
 =$216,000+($15,120-$13,800)=$217,320 
 In 2018, Actual interest expense=($217,320×7%) -15,212 
4 Add-wrongly charged depreciation expenses 
 In 2017=($8,100×10%) 810 
 In 2018,=($8,100-$810)×10%+$8,500×10% = 1,579 
 Less-actual expenses for repairs -8,100 -8,500 
 Corrected income before tax 65,690 102,467