Answer:
The differential cost = $8.55
Explanation:
When there is a contrast between the cost of two alternatives to decide to process further or not, it is termed as a differential cost. Company uses the differential cost concept when there are more than one products to produce.
Here, the company has two products - Product J and Product D. Product J is selling currently with a cost of $15.75. If the company wants to produce Product D, they need additional $8.55 cost. Therefore, $8.55 is the differential cost of producing product D.