At a stadium, each adult ticket cost $28 and each child ticket cost $17. On Saturday, the number of adult tickets sold was 160 less than the number of child tickets. On Sunday, the number of adult tickets sold decreased by 40% while the number of child tickets sold increased by 10%. If a total of 1536 tickets were sold on Sunday, how much money was collected on Saturday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 160	2 u + 160
Change	- 0.4 u	+ 0.1 u + 16
After	0.6 u	1.1 u + 176	1.7 u + 176

40% x 1 u = ⁴⁰₁₀₀ x 1 u = 0.4 u 
10% x 1 u = ¹⁰₁₀₀ x 1 u = 0.1 u
10% x 160 = ¹⁰₁₀₀ x 160 = 16

Number of tickets sold on Sunday
= 0.6 u + 1.1 u + 176
= 1.7 u + 176

1.7 u + 176 = 1536
1.7 u = 1536 - 176
1.7 u = 1360

1 u = 1360 ÷ 1.7 = 800

Amount collected from adult tickets on Saturday
= 1 u x 28
= 800 x 28
= $22400

Amount collected from child tickets on Saturday
= 17(1 u + 160)
= 17(800 + 160)
= 17 x 960
= $16320

Total amount collected on Saturday
= 22400 + 16320
= $38720

Answer(s):$38720