Corna wants to buy a shirt. The store buys the shirt for $20, but charges 30% for profit. However, the shirt is on sale for 50% off the selling price. What is the price now? Let's answer step by step:
First find how much the store makes in profit: $20 * 0.30 = $6 for profit. Then find the regular selling price: $20 + $6 = $26 total price. Then multiply the regular price by the discount to get $26 * 0.50 = $13 for the final price. The answer: 13.