Irene sold $2184 worth of shirts and jackets. She earned $840 less on the jackets than the shirts. Each jacket is sold for $10 more than each shirt. The number of jackets sold was ²₇ of the number of shirts sold.

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

(a)
Amount that Irene earned from the sales of the shirts
= (2184 + 840) ÷ 2
= 3024 ÷ 2
= $1512 

(b)
Amount that Irene earned from the sales of the jackets
= 1512 - 840
= $672

Number of sets of jackets sold = 2  
Number of sets of shirts sold = 7

Cost of 1 set of jackets sold
= 672 ÷ 2
= $336

Cost of 1 set of shirts sold
= 1512 ÷ 7
= $216

Amount that 1 set of jackets was more than 1 set of shirts 
= 336 - 216
= $120

Number of items in 1 set
= 120 ÷ 10
= 12

Number of shirts sold
= 7 x 12
= 84

Answer(s): (a) $1512 ; (b) 84