On Saturday, 660 more men than women attended a concert. On Sunday, the number of men decreased by 50% and the number of women increased by 80%. 583 audience attended the concert on Sunday. If each ticket cost $11, how much money was collected from the sale of concert tickets on Saturday?

	Men		Women
Comparing between the men and the women at first	660 more
Before	2x5	+ 660	5x2
Change	- 1x5	- 330	+ 4x2
After	1x5	+ 330	9x2

	Men		Women
Before	10 u + 660		10 u
Change	- 5 u - 330		+ 8 u
After	5 u + 330		18 u

50% = ⁵⁰₁₀₀ = ¹₂

80% = ⁸⁰₁₀₀ = ⁴₅

50% x 660
= ⁵⁰₁₀₀ x 660
= 330

660 - 330 = 330

Total number of tickets sold on Sunday 
= 5 u + 330 + 18 u
= 23 u + 330 

23 u + 330 = 583
23 u = 583 - 330
23 u = 253

1 u = 253 ÷ 23 = 11

Total number of tickets sold on Saturday
= 10 u + 660 + 10 u 
= 20 u + 660
= 20 x 11 + 330
= 550

Amount collected from the sale of concert tickets on Saturday
= 550 x 11
= $6050

Answer(s): $6050