There were 500 T-shirts at a boutique. ²₅ of them were with collars. T-shirts with collars were priced at $4 each. T-shirts without collars were priced at $12 each. The boutique owner sold ²₅ of the T-shirts with collars and ⁴₅ 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 = 500

1 u = 500 ÷ 5 = 100

Number of T-shirts with collars
= 2 u
= 2 x 100
= 200

Number of T-shirts with collars sold 
= ²₅ x 200
= 80

Number of T-shirts without collars
= 3 u
= 3 x 100
= 300

Number of T-shirts without collars sold
= ⁴₅ x 300
= 240

Amount that the boutique owner collected from the sale of the T-shirts with collars
= 80 x 4
= $320

Amount that the boutique owner collected from the sale of the T-shirts without collars
= 240 x 12
= $2880

Total amount that the boutique owner collected from all the T-shirts he sold
= 320 + 2880
= $3200

Answer(s): $3200