John's Hardware, a small retailer in your part of town, would like to determine selling price of a new glue gun. The store's customary % markup is based on JH's customer's cost. Naturally, JH also know the manufacturer's selling price. Please help the storo? Selling price Cost X(1 - % markup) O Selling Price - Cost /(1+ % markup) All the other 4 answers are correct. Selling Price - Cost X (1 + % markup) Selling Price Cost / (1 - % markup)