There were 150 T-shirts at a shop. ²₅ of them were without collars. T-shirts without collars were priced at $4 each. T-shirts with collars were priced at $12 each. The shop owner sold ¹₆ of the T-shirts without collars and ⁸₉ 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 = 150

1 u = 150 ÷ 5 = 30

Number of T-shirts without collars
= 2 u
= 2 x 30
= 60

Number of T-shirts without collars sold 
= ¹₆ x 60
= 10

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

Number of T-shirts with collars sold
= ⁸₉ x 90
= 80

Amount that the shop owner collected from the sale of the T-shirts without collars
= 10 x 4
= $40

Amount that the shop owner collected from the sale of the T-shirts with collars
= 80 x 12
= $960

Total amount that the shop owner collected from all the T-shirts he sold
= 40 + 960
= $1000

Answer(s): $1000