There were 120 T-shirts at a stall. ³₄ of them were with collars. T-shirts with collars were priced at $7 each. T-shirts without collars were priced at $8 each. The stall owner sold ¹₅ of the T-shirts with collars and ⁴₅ of the T-shirts without collars. How much did he collect from all the T-shirts he sold?
Number of T-shirts = 4 u

4 u = 120

1 u = 120 ÷ 4 = 30

Number of T-shirts with collars
= 3 u
= 3 x 30
= 90

Number of T-shirts with collars sold 
= ¹₅ x 90
= 18

Number of T-shirts without collars
= 1 u
= 1 x 30
= 30

Number of T-shirts without collars sold
= ⁴₅ x 30
= 24

Amount that the stall owner collected from the sale of the T-shirts with collars
= 18 x 7
= $126

Amount that the stall owner collected from the sale of the T-shirts without collars
= 24 x 8
= $192

Total amount that the stall owner collected from all the T-shirts he sold
= 126 + 192
= $318

Answer(s): $318