Answer:
a. 40%
Explanation:
The computation of the gross profit rate is shown below:
Gross profit rate = (Gross profit) ÷ (Sales revenue) × 100
where,
Gross profit = Sales revenue - cost of goods sold
= $225,000 - $135,000
= $90,000
And, the sales revenue is $225,000
So, the gross profit rate is
= ($90,000) ÷ ($225,000)
= 40%
It shows a relationship between the gross profit and the sales revenue