Consider the question. Marlene wants to buy half a dozen of shirts to avail of the sale. The regular price of a shirt is $50 and is now on sale at a 20% discount. How much will Marlene pay for the shirts?
 What is the step-by-step reasoning process to arrive at the answer: 240?
Marlene wants to buy 12 / 2 = 6 shirts. The discount price of the shirt is $50 x 20 / 100 = $10. So, the shirt will only costs $50 - $10 = $40 each. Thus, Marlene will pay $40 x 6 = $240 for the 6 shirts.