Answer:
$40,000
Step-by-step explanation:
Differential operating profit refers to how much will the company's operating profit change if another project or projects is/are carried out.
In this case, the normal operating profit = $2,000,000 - $1,500,000 = $500,000. When the new product line is introduced, additional revenues and costs will result in $40,000 more in profits (= $200,000 - $160,000). The differential operating profits are the $40,000 generated by the new product line.