At a park, each adult ticket cost $27 and each child ticket cost $18. On Friday, the number of adult tickets sold was 130 less than the number of child tickets. On Saturday, the number of adult tickets sold decreased by 25% while the number of child tickets sold increased by 30%. If a total of 1194 tickets were sold on Saturday, how much money was collected on Friday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 130	2 u + 130
Change	- 0.25 u	+ 0.3 u + 39
After	0.75 u	1.3 u + 169	2.05 u + 169

25% x 1 u = ²⁵₁₀₀ x 1 u = 0.25 u 
30% x 1 u = ³⁰₁₀₀ x 1 u = 0.3 u
30% x 130 = ³⁰₁₀₀ x 130 = 39

Number of tickets sold on Saturday
= 0.75 u + 1.3 u + 169
= 2.05 u + 169

2.05 u + 169 = 1194
2.05 u = 1194 - 169
2.05 u = 1025

1 u = 1025 ÷ 2.05 = 500

Amount collected from adult tickets on Friday
= 1 u x 27
= 500 x 27
= $13500

Amount collected from child tickets on Friday
= 18(1 u + 130)
= 18(500 + 130)
= 18 x 630
= $11340

Total amount collected on Friday
= 13500 + 11340
= $24840

Answer(s):$24840