Can someone help me, I don't understand this. There are 3 parts to this question. Part A, Part B, and Part C.
Ken wants to make a triangular sunshade to cover his deck. The shade is made of two identical right triangles. Based on this, Answer Parts A, B, and C below.
(Go to my profile to see Parts A and B)

Part C:
If the material for the shade costs $12.50 per square foot, how much will it cost Ken to make the shade in Part B?
Area Δ = 1/2 bh
Include all relevant calculations.