hundreds of yen. (a) Determine the price elasticity of demand E when the retail price is set at 400. E= Interpret your answer. The demand is going by % per 1% increase in price at that price level. Thus, a large price is advised. (b) At what price will revenue be a maximum? (Round your answer to the nearest integer.) yen (c) Approximately how many paint-by-number sets will be sold per month at the price in part (b)? (Round your answer to the nearest integer.) paint-by-number sets per month