On Saturday, 480 more women than men attended a concert. On Sunday, the number of women decreased by 50% and the number of men increased by 80%. 1275 audience attended the concert on Sunday. If each ticket cost $18, how much money was collected from the sale of concert tickets on Saturday?

	Women		Men
Comparing between the women and the men at first	480 more
Before	2x5	+ 480	5x2
Change	- 1x5	- 240	+ 4x2
After	1x5	+ 240	9x2

	Women		Men
Before	10 u + 480		10 u
Change	- 5 u - 240		+ 8 u
After	5 u + 240		18 u

50% = ⁵⁰₁₀₀ = ¹₂

80% = ⁸⁰₁₀₀ = ⁴₅

50% x 480
= ⁵⁰₁₀₀ x 480
= 240

480 - 240 = 240

Total number of tickets sold on Sunday 
= 5 u + 240 + 18 u
= 23 u + 240 

23 u + 240 = 1275
23 u = 1275 - 240
23 u = 1035

1 u = 1035 ÷ 23 = 45

Total number of tickets sold on Saturday
= 10 u + 480 + 10 u 
= 20 u + 480
= 20 x 45 + 240
= 1140

Amount collected from the sale of concert tickets on Saturday
= 1140 x 18
= $20520

Answer(s): $20520