There were 630 T-shirts at a store. ⁵₇ of them were without collars. T-shirts without collars were priced at $11 each. T-shirts with collars were priced at $7 each. The store owner sold ¹₆ of the T-shirts without collars and ⁹₁₀ of the T-shirts with collars. How much did he collect from all the T-shirts he sold?
Number of T-shirts = 7 u

7 u = 630

1 u = 630 ÷ 7 = 90

Number of T-shirts without collars
= 5 u
= 5 x 90
= 450

Number of T-shirts without collars sold 
= ¹₆ x 450
= 75

Number of T-shirts with collars
= 2 u
= 2 x 90
= 180

Number of T-shirts with collars sold
= ⁹₁₀ x 180
= 162

Amount that the store owner collected from the sale of the T-shirts without collars
= 75 x 11
= $825

Amount that the store owner collected from the sale of the T-shirts with collars
= 162 x 7
= $1134

Total amount that the store owner collected from all the T-shirts he sold
= 825 + 1134
= $1959

Answer(s): $1959