pets inc. launches a new advertising promotion where, for each purchase over $30, it offers a coupon for a 35% discount on a future purchase. there is a limit of one coupon per customer. pets inc. estimates that 28% of customers receiving the coupon will redeem the coupon on an average purchase of $24. sales on the first day of the one-week promotional period totaled $200,000 resulting in 2,000 coupons distributed. assume all sales were cash sales. cost of sales is 45% of the selling price.