A clothing store sells T-shirts for $8 a shirt, and shorts, s for $12 each. The store earned $180 revenue last month. The store sold three times as many T-
shirts as shorts. Using the method of substitution, how many T-shirts and
shorts did the store sell?
A. t-8; s = 12
B. t =5; 8-15
C. t = 12; s 8
D. t =15;$=5