You have decided that you want to attend a costume party as Black Panther. You estimate that it will cost $40 to assemble your costume. After spending $40 on the costume, you realize that the additional pieces you need will cost you $25 more. What is the marginal cost of completing the costume

$25

Explanation:

Based on the information given if it was estimated that it will cost the amount of $40 in order to assemble the costume which means that After spending the amount of $40 on the costume and you realize that the additional pieces that you will need will still cost extra amount of $25 , that simply means that the MARGINAL COST of you completing the costume will be the extra amount of $25 .

the answer is     d. in our global economy, most job growth will be in services, but manufacturing jobs will exist, too.