At a zoo, each adult ticket cost $29 and each child ticket cost $10. On Tuesday, the number of adult tickets sold was 156 less than the number of child tickets. On Wednesday, the number of adult tickets sold decreased by 5% while the number of child tickets sold increased by 25%. If a total of 855 tickets were sold on Wednesday, how much money was collected on Tuesday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 156	2 u + 156
Change	- 0.05 u	+ 0.25 u + 39
After	0.95 u	1.25 u + 195	2.2 u + 195

5% x 1 u = ⁵₁₀₀ x 1 u = 0.05 u 
25% x 1 u = ²⁵₁₀₀ x 1 u = 0.25 u
25% x 156 = ²⁵₁₀₀ x 156 = 39

Number of tickets sold on Wednesday
= 0.95 u + 1.25 u + 195
= 2.2 u + 195

2.2 u + 195 = 855
2.2 u = 855 - 195
2.2 u = 660

1 u = 660 ÷ 2.2 = 300

Amount collected from adult tickets on Tuesday
= 1 u x 29
= 300 x 29
= $8700

Amount collected from child tickets on Tuesday
= 10(1 u + 156)
= 10(300 + 156)
= 10 x 456
= $4560

Total amount collected on Tuesday
= 8700 + 4560
= $13260

Answer(s):$13260