There were 350 T-shirts at a boutique. ⁵₇ of them were with collars. T-shirts with collars were priced at $5 each. T-shirts without collars were priced at $11 each. The boutique owner sold ¹₅ of the T-shirts with collars and ⁹₁₀ of the T-shirts without collars. How much did he collect from all the T-shirts he sold?
Number of T-shirts = 7 u

7 u = 350

1 u = 350 ÷ 7 = 50

Number of T-shirts with collars
= 5 u
= 5 x 50
= 250

Number of T-shirts with collars sold 
= ¹₅ x 250
= 50

Number of T-shirts without collars
= 2 u
= 2 x 50
= 100

Number of T-shirts without collars sold
= ⁹₁₀ x 100
= 90

Amount that the boutique owner collected from the sale of the T-shirts with collars
= 50 x 5
= $250

Amount that the boutique owner collected from the sale of the T-shirts without collars
= 90 x 11
= $990

Total amount that the boutique owner collected from all the T-shirts he sold
= 250 + 990
= $1240

Answer(s): $1240