A local pizza owner decides to hire an economic consultant to help him set his prices. Currently, one slice of pizza costs $2 and the store sells about 800 slices per week. The economic consultant estimates that the price elasticity of demand is equal to -0.5, and suggests that the shop owner should increase the price of a slice of pizza by $0.25; that is, the consultant recommends increasing the price of pizza by %. The consultant claims that doing so would result in a decrease in the number of slices sold by , and result in |:| in revenue