Quick Check The selling price of a three-pack of tennis balls is $3.95, and the markup is 25s% of selling price. Find the markup. Quick Check What is the markup on a sleeping bag if the cost is $40.80 and the markup is 32% of selling price? Quick Check Ski boots originally priced at $289.99 were marked down 40%. Find the reduced price. Quick Check A propane forced-air heater normally selling for %290 is marked down 25%. If the cost of eh heater is $220 and the operating expenses are 15% of cost, find (a) the operating loss and (b) the absolute loss