Apple is facing the aggregate planning problem shown in the table below. Cost of regular

production is $$8$ per unit, the cost of producing the same unit on overtime is $$15,$ the cost of

subcontracting is $$12$ per unit, and the cost of carrying a unit in inventory from one month to the

next is $$6\mathrm{.}5)$ What is the optimal total cost of the aggregate plan developed to address this problem?

A$)$ $$27,200$

B$)$ $$20,960$

C$)$ $$31,400$

D$)$ $$26,600$