At a bird park, each adult ticket cost $34 and each child ticket cost $8. On Friday, the number of adult tickets sold was 92 less than the number of child tickets. On Saturday, the number of adult tickets sold decreased by 15% while the number of child tickets sold increased by 25%. If a total of 1165 tickets were sold on Saturday, how much money was collected on Friday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 92	2 u + 92
Change	- 0.15 u	+ 0.25 u + 23
After	0.85 u	1.25 u + 115	2.1 u + 115

15% x 1 u = ¹⁵₁₀₀ x 1 u = 0.15 u 
25% x 1 u = ²⁵₁₀₀ x 1 u = 0.25 u
25% x 92 = ²⁵₁₀₀ x 92 = 23

Number of tickets sold on Saturday
= 0.85 u + 1.25 u + 115
= 2.1 u + 115

2.1 u + 115 = 1165
2.1 u = 1165 - 115
2.1 u = 1050

1 u = 1050 ÷ 2.1 = 500

Amount collected from adult tickets on Friday
= 1 u x 34
= 500 x 34
= $17000

Amount collected from child tickets on Friday
= 8(1 u + 92)
= 8(500 + 92)
= 8 x 592
= $4736

Total amount collected on Friday
= 17000 + 4736
= $21736

Answer(s):$21736