There were 200 T-shirts at a shop. ³₅ of them were without collars. T-shirts without collars were priced at $10 each. T-shirts with collars were priced at $8 each. The shop owner sold ¹₅ of the T-shirts without collars and ⁷₈ of the T-shirts with collars. How much did he collect from all the T-shirts he sold?
Number of T-shirts = 5 u

5 u = 200

1 u = 200 ÷ 5 = 40

Number of T-shirts without collars
= 3 u
= 3 x 40
= 120

Number of T-shirts without collars sold 
= ¹₅ x 120
= 24

Number of T-shirts with collars
= 2 u
= 2 x 40
= 80

Number of T-shirts with collars sold
= ⁷₈ x 80
= 70

Amount that the shop owner collected from the sale of the T-shirts without collars
= 24 x 10
= $240

Amount that the shop owner collected from the sale of the T-shirts with collars
= 70 x 8
= $560

Total amount that the shop owner collected from all the T-shirts he sold
= 240 + 560
= $800

Answer(s): $800