A company makes backyard playground equipment such as swing sets, slides, and play sets. The cost (in dollars) to make a specific style of each piece is given in matrix C. The sales price (in dollars) for each piece is given in matrix S. Two stores sell these specific pieces, and matrix A gives the quantities sold during one month.

Determine and interpret the following matrices:
(a) AC
(b) AS
(c) S - C
(d) A(S - C)

[165] Swing set C = 65 Slide [210] Play set [200] Swing set 80 Slide [ 250] Play set Swing set 15 Slide Play set 20 12 10 17