Two departments of a firm, A and $B,$ need differing amounts of steel, wood, and plastic. The table on the right gives the

amount of each product the departments need.

These three products are supplied by two suppliers, Company C and Company D$,$ with the unit prices given in the table on

the right.

a$.$ Use matrix multiplication to determine how much these orders will cost each department at each of the two

suppliers. Enter the amounts into the cost matrix shown on the right.

Co$.$ C

Co$.$ D

Dept. A Dept. B $[$