(1 pt) Bob sells tires. He knows that his weekly sales drop if he increases the unit price p an dollars). The weekly sales are given by an unknown function N (p). His weekly revenue is R0?) = pN(p)- Bob is currently selling tires for 50 dollars each. His weekly sales are running at 150 tires per week. so N (50) = 150. His marketing department estimates that he will lose 2 sales per week for each 10 dollar increase in unit price, so N ' (50) = 0.2. Estimate Bob's increase in weekly revenue for each one dollar increase in tire price. Revenue increase = dollars