At a theme park, each adult ticket cost $40 and each child ticket cost $15. On Thursday, the number of adult tickets sold was 160 less than the number of child tickets. On Friday, the number of adult tickets sold decreased by 30% while the number of child tickets sold increased by 10%. If a total of 1256 tickets were sold on Friday, how much money was collected on Thursday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 160	2 u + 160
Change	- 0.3 u	+ 0.1 u + 16
After	0.7 u	1.1 u + 176	1.8 u + 176

30% x 1 u = ³⁰₁₀₀ x 1 u = 0.3 u 
10% x 1 u = ¹⁰₁₀₀ x 1 u = 0.1 u
10% x 160 = ¹⁰₁₀₀ x 160 = 16

Number of tickets sold on Friday
= 0.7 u + 1.1 u + 176
= 1.8 u + 176

1.8 u + 176 = 1256
1.8 u = 1256 - 176
1.8 u = 1080

1 u = 1080 ÷ 1.8 = 600

Amount collected from adult tickets on Thursday
= 1 u x 40
= 600 x 40
= $24000

Amount collected from child tickets on Thursday
= 15(1 u + 160)
= 15(600 + 160)
= 15 x 760
= $11400

Total amount collected on Thursday
= 24000 + 11400
= $35400

Answer(s):$35400