72. Ace Tire recaps tires at a cost of $20 per tire. Past experience shows that 12% of the recapped tires must be sold as seconds for $25. If they recap 400 tires and a markup of 100% of cost is desired, find the regular selling price per tire. 78. A store sells yogurt marked with a last date of sale. The owners pay 31 cents a container and use a markup of 38% of selling price. On the last day of sale they reduce the price to 33 cents, and continue to sell them for an additional two days. After that any remaining containers are discarded. In a shipment of 100 containers they expect to sell 5% at the reduced price and to discard about 3%. What original price would give the store the required markup for the entire shipment