11. COMMUNICATION EQUIPMENT A discount store purchased DVD players at a cost of $288 dozen. If the store needs 20% of cost to cover operating expenses and 15% of per cost for the net profit, what are (a) the selling price of a DVD player and (b) the percent of markup on selling price?

Rolf's Golf store sells golf balls for $35 per dozen. The store's overhead expenses are 28% of cost and the owners require a profit of 21% of cost.  a. How much does Rolf's Golf store buy the golf balls for? per dozen Round to the nearest cent.     b. What is the price needed to cover all the costs and expenses? Round to the nearest cent.   c. What is the highest rate of markdown at which the store will still break even? Round to two decimal places.   d. What markdown rate would price the golf balls at cost? Round to two decimal places.