You have decided that you want to attend a costume party as iron man. 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. the marginal cost of completing the costume is

the marginal cost = $25

Explanation:

given data

estimate  cost = $40

spending on costume = $40

additional pieces cost = $25

to find out

marginal cost of completing the costume is

solution

we know here we consume $40 and we spent that all then $25 need more

so here we can say that marginal cost is the cost added for getting an additional unit of product or service

and the last products demanded costs = $25

so

therefore it is the marginal cost i.e $25