At a museum, each adult ticket cost $29 and each child ticket cost $5. On Friday, the number of adult tickets sold was 120 less than the number of child tickets. On Saturday, the number of adult tickets sold decreased by 30% while the number of child tickets sold increased by 45%. If a total of 604 tickets were sold on Saturday, how much money was collected on Friday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 120	2 u + 120
Change	- 0.3 u	+ 0.45 u + 54
After	0.7 u	1.45 u + 174	2.15 u + 174

30% x 1 u = ³⁰₁₀₀ x 1 u = 0.3 u 
45% x 1 u = ⁴⁵₁₀₀ x 1 u = 0.45 u
45% x 120 = ⁴⁵₁₀₀ x 120 = 54

Number of tickets sold on Saturday
= 0.7 u + 1.45 u + 174
= 2.15 u + 174

2.15 u + 174 = 604
2.15 u = 604 - 174
2.15 u = 430

1 u = 430 ÷ 2.15 = 200

Amount collected from adult tickets on Friday
= 1 u x 29
= 200 x 29
= $5800

Amount collected from child tickets on Friday
= 5(1 u + 120)
= 5(200 + 120)
= 5 x 320
= $1600

Total amount collected on Friday
= 5800 + 1600
= $7400

Answer(s):$7400