On Tuesday, 520 more men than women attended a concert. On Wednesday, the number of men decreased by 40% and the number of women increased by 70%. 910 audience attended the concert on Wednesday. If each ticket cost $17, how much money was collected from the sale of concert tickets for the two days?

	Men		Women
Comparing between the men and the women at first	520 more
Before	5x2	+ 520	10x1
Change	- 2x2	- 208	+ 7x1
After	3x2	+ 312	17x1

	Men		Women
Before	10 u + 520		10 u
Change	- 4 u - 208		+ 7 u
After	6 u + 312		17 u

40% = ⁴⁰₁₀₀ = ²₅

70% = ⁷⁰₁₀₀ = ⁷₁₀

40% x 520
= ⁴⁰₁₀₀ x 520
= 208

520 - 208 = 312

Total number of tickets sold on Wednesday 
= 6 u + 312 + 17 u
= 23 u + 312 

23 u + 312 = 910
23 u = 910 - 312
23 u = 598

1 u = 598 ÷ 23 = 26

Total number of tickets sold for the two days
= (10 u + 520) + 10 u + (6 u + 312) + 17 u
= 43 u + 832
= 43 x 26 + 832
= 1950

Amount collected from the sale of concert tickets for the two days
= 1950 x 17
= $33150

Answer(s): $33150