The vendor sells:
24 sweat shirts for $15 each
51 t-shirts for $10 each
13 hats for $8 each
Total price = $(24 × 15) + $(51 × 10) + $(13 × 8) = $974
Total number of items = 24 + 51 + 13 = 88
Average price per item = $974 ÷ 88 = $11.06818182
1 cent = $0.01
The answer is $11.07 to nearest cent.