A manufacturer of flip flops currently sells one type for $15. The price p and demand x for these flip flops are related by f(p) = 9500 -250p. If the current price of $15 is increased will the revenue increase or decrease? Show the following work to receive credit for this problem: 1. Calculate E(p). 2. Find E(15). 3. Determine if demand is elastic, inelastic or of unit elasticity at p =15. 4. If the price is increased from $15, will the revenue decrease or increase