AAAS4A Scoopy-Doo Pet Foods prices its pet food to maintain a 45% 37. margin. A 7-kg. bag of Woof-Woof dog food costs $27.50. Calculate the selling price. CK Winery sells its merlot red wine for $21.00. If the rate of markup is 200%, what did the wine cost the retailer? What is the percent margin? 38. If you knew that an appliance dealer makes $100 on the sale of a certain model of washing machine and the dealer has a markup policy of 20% of cost, how much did this washer cost the dealer? What is the selling price of the washer? Find the percent margin. 39