Answer:
1. TIE ratio = EBIT / Interest expense
EBIT = [ (Annual sales x profit margin) / (1 - tax rate) ] + Amount of debt x interest rate
= [ ($2,880,000 x 3%) / (1 - 0.30) ] + $800,000 x 8%
= 187428.57143
= $187,428.57
TIE ratio = $187,428.57 / ($800,000 x 8%)
TIE ratio = $187,428.57 / $64,000
TIE ratio = 2.92857
TIE ratio = 2.93
2. ROIC = [ EBIT x (1 - tax rate) ] / (Amount of debt + common stock)
= [$187428.57 x (1 - 0.30) ] / ($800,000 + $600,000)
= 0.093714285
= 9.37%