At a safari park, each adult ticket cost $34 and each child ticket cost $7. On Saturday, the number of adult tickets sold was 200 less than the number of child tickets. On Sunday, the number of adult tickets sold decreased by 50% while the number of child tickets sold increased by 30%. If a total of 980 tickets were sold on Sunday, how much money was collected on Saturday?

	Adult tickets	Child tickets	Total tickets
Before	1 u	1 u + 200	2 u + 200
Change	- 0.5 u	+ 0.3 u + 60
After	0.5 u	1.3 u + 260	1.8 u + 260

50% x 1 u = ⁵⁰₁₀₀ x 1 u = 0.5 u 
30% x 1 u = ³⁰₁₀₀ x 1 u = 0.3 u
30% x 200 = ³⁰₁₀₀ x 200 = 60

Number of tickets sold on Sunday
= 0.5 u + 1.3 u + 260
= 1.8 u + 260

1.8 u + 260 = 980
1.8 u = 980 - 260
1.8 u = 720

1 u = 720 ÷ 1.8 = 400

Amount collected from adult tickets on Saturday
= 1 u x 34
= 400 x 34
= $13600

Amount collected from child tickets on Saturday
= 7(1 u + 200)
= 7(400 + 200)
= 7 x 600
= $4200

Total amount collected on Saturday
= 13600 + 4200
= $17800

Answer(s):$17800