Answer and Explanation:
The computation is shown below:
Note Due date Interest Explanation
a) May-04 $ 1,800 ($ 90,000 × 6% × 120 ÷ 360)
b) Mar-16 $70 ($21,000 × 4% × 30 ÷ 360)
c) Jul-03 $680 ($68,000 × 8% × 45 ÷ 360)
In this way the interest expense should be calculated
The same should be relevant and considered too