Until recently, hamburgers at the city sports arena cost $1.98 each. The food concessionaire sold an average of 2754 hamburgers on game night. When the price was raised to $3.92, hamburger sales dropped off to an average of 1665 per night. The concessionaire's fixed costs were $3244.38 per night and the variable cost was $0.58 per hamburger. A) Assume that the relationship between price p and demand x is linear. Find the price-demand function, p(x). p=p(x)= (Round all values to 3 decimal places as needed.) B) Find the revenue function R(x). R(x)= C) Assume that the cost function is linear. Find the cost function, C(x). C(x)= D) Find the profit function P(x). P(x)=