At a concert hall, each adult ticket cost $27 and each child ticket cost $14. On Friday, the number of adult tickets sold was 166 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 50%. If a total of 719 tickets were sold on Saturday, how much money was collected on Friday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 166	2 u + 166
Change	- 0.15 u	+ 0.5 u + 83
After	0.85 u	1.5 u + 249	2.35 u + 249

15% x 1 u = ¹⁵₁₀₀ x 1 u = 0.15 u 
50% x 1 u = ⁵⁰₁₀₀ x 1 u = 0.5 u
50% x 166 = ⁵⁰₁₀₀ x 166 = 83

Number of tickets sold on Saturday
= 0.85 u + 1.5 u + 249
= 2.35 u + 249

2.35 u + 249 = 719
2.35 u = 719 - 249
2.35 u = 470

1 u = 470 ÷ 2.35 = 200

Amount collected from adult tickets on Friday
= 1 u x 27
= 200 x 27
= $5400

Amount collected from child tickets on Friday
= 14(1 u + 166)
= 14(200 + 166)
= 14 x 366
= $5124

Total amount collected on Friday
= 5400 + 5124
= $10524

Answer(s):$10524