Nick spent $1530 on shirts and cardigans. The number of cardigans he bought was ¹₂ the number of shirts he bought. The cost of a cardigan was $9 more than the cost of a shirt. He paid $390 more on shirts than on cardigans. Find the cost of 3 shirts and 4 cardigans.

	Shirts	Cardigans
Number of sets	2 sets	1 set
Compare each		$9 more
Total value	$960	$570

Total cost of cardigans
= (1530 - 390) ÷ 2
= $570

Total cost of shirts
= 570 + 390
= $960

2 sets of shirts = $960
1 set of shirts = 960 ÷ 2 = $480 

1 set of cardigans = $570

Difference in 1 set of cardigans and 1 set of shirts
= 570 - 480
= $90

Number of clothing in 1 set
= 90 ÷ 9
= 10

Cost of 1 shirt
= 480 ÷ 10
= $48

Cost of 1 cardigan
= 48 + 9
= $57

Price of 3 shirts and 4 cardigans
= (3 x 48) + (4 x 57)
= 144 + 228
= $372

Answer(s): $372