A customer took clothes to the cleaners three times last month. First, he brought 1 shirt and 2 pairs of slacks and paid $12. Then he brought 7 shirts, 4 pairs of slacks, and 1 sports coat and paid $41. Finally, he brought 3 shirts and 1 sports coat and paid $13. How much was he charged for each shirt, each pair of slacks, and each sports coat?
The customer was charged \$☐ for each shirt, \$☐ for each pair of slacks, and \$☐ for each sports coat.
