Differential Aralyais for Soles Promotion Proposal Sale Mates Ine. is plarning a one-month campaign for. July to promote sales of one of its two shoe products. A total of $100,000 has been budgetaid for advertising, contests, redeemoble cocipons, and other promotional activities. The following data have been assembled for theit possible usefuiness in deciding which of the products to select for the campelgn: additional units at wakang shoes could be sold without changing the unit selling price of either pioduct Additional units of walking shoes could be sold without changing the unit seling price of ether probect Rexuited: bse an inas sign Differential Analysis Promate Tennis Stiees (Alt, 1) or Promote Walking shees (Alt, 2)