Mary sold $4740 worth of shirts and jackets. She earned $300 less on the jackets than the shirts. Each jacket is sold for $7 more than each shirt. The number of jackets sold was ⁵₇ of the number of shirts sold.

1. How much did Mary earn from the sales of the shirts?
2. How many jackets were sold?

(a)
Amount that Mary earned from the sales of the shirts
= (4740 + 300) ÷ 2
= 5040 ÷ 2
= $2520 

(b)
Amount that Mary earned from the sales of the jackets
= 2520 - 300
= $2220

Number of sets of jackets sold = 5  
Number of sets of shirts sold = 7

Cost of 1 set of jackets sold
= 2220 ÷ 5
= $444

Cost of 1 set of shirts sold
= 2520 ÷ 7
= $360

Amount that 1 set of jackets was more than 1 set of shirts 
= 444 - 360
= $84

Number of items in 1 set
= 84 ÷ 7
= 12

Number of jackets sold
= 5 x 12
= 60

Answer(s): (a) $2520 ; (b) 60