Answer:
the marginal cost = $25
Step-by-step 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