There were 200 T-shirts at a shop. ²₅ of them were with collars. T-shirts with collars were priced at $9 each. T-shirts without collars were priced at $10 each. The shop owner sold ¹₂ of the T-shirts with collars and ³₄ of the T-shirts without 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 with collars
= 2 u
= 2 x 40
= 80

Number of T-shirts with collars sold 
= ¹₂ x 80
= 40

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

Number of T-shirts without collars sold
= ³₄ x 120
= 90

Amount that the shop owner collected from the sale of the T-shirts with collars
= 40 x 9
= $360

Amount that the shop owner collected from the sale of the T-shirts without collars
= 90 x 10
= $900

Total amount that the shop owner collected from all the T-shirts he sold
= 360 + 900
= $1260

Answer(s): $1260