At a museum, each adult ticket cost $26 and each child ticket cost $5. On Friday, the number of adult tickets sold was 190 less than the number of child tickets. On Saturday, the number of adult tickets sold decreased by 35% while the number of child tickets sold increased by 30%. If a total of 637 tickets were sold on Saturday, how much money was collected on Friday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 190	2 u + 190
Change	- 0.35 u	+ 0.3 u + 57
After	0.65 u	1.3 u + 247	1.95 u + 247

35% x 1 u = ³⁵₁₀₀ x 1 u = 0.35 u 
30% x 1 u = ³⁰₁₀₀ x 1 u = 0.3 u
30% x 190 = ³⁰₁₀₀ x 190 = 57

Number of tickets sold on Saturday
= 0.65 u + 1.3 u + 247
= 1.95 u + 247

1.95 u + 247 = 637
1.95 u = 637 - 247
1.95 u = 390

1 u = 390 ÷ 1.95 = 200

Amount collected from adult tickets on Friday
= 1 u x 26
= 200 x 26
= $5200

Amount collected from child tickets on Friday
= 5(1 u + 190)
= 5(200 + 190)
= 5 x 390
= $1950

Total amount collected on Friday
= 5200 + 1950
= $7150

Answer(s):$7150