Nick spent $660 on skirts and shirts. The number of shirts he bought was ¹₃ the number of skirts he bought. The cost of a shirt was $8 more than the cost of a skirt. He paid $270 more on skirts than on shirts. Find the cost of 7 skirts and 9 shirts.

	Skirts	Shirts
Number of sets	3 sets	1 set
Compare each		$8 more
Total value	$465	$195

Total cost of shirts
= (660 - 270) ÷ 2
= $195

Total cost of skirts
= 195 + 270
= $465

3 sets of skirts = $465
1 set of skirts = 465 ÷ 3 = $155 

1 set of shirts = $195

Difference in 1 set of shirts and 1 set of skirts
= 195 - 155
= $40

Number of clothing in 1 set
= 40 ÷ 8
= 5

Cost of 1 skirt
= 155 ÷ 5
= $31

Cost of 1 shirt
= 31 + 8
= $39

Price of 7 skirts and 9 shirts
= (7 x 31) + (9 x 39)
= 217 + 351
= $568

Answer(s): $568