Brigg's Widgets used market surveys and linear regression to develop a demand function based on the wholesale price. The demand function is q = –120p + 9,000. The expense function is E = 6.00q + 15,000.

a. Express the expense function in terms of p.
b. At a price of $15.00, how many widgets are demanded?
c. How much does it cost to produce the number of widgets from part b?

For 18 points