On Monday, 570 more women than men attended a concert. On Tuesday, the number of women decreased by 10% and the number of men increased by 50%. 1257 audience attended the concert on Tuesday. If each ticket cost $13, how much money was collected from the sale of concert tickets for the two days?

	Women		Men
Comparing between the women and the men at first	570 more
Before	10x1	+ 570	2x5
Change	- 1x1	- 57	+ 1x5
After	9x1	+ 513	3x5

	Women		Men
Before	10 u + 570		10 u
Change	- 1 u - 57		+ 5 u
After	9 u + 513		15 u

10% = ¹⁰₁₀₀ = ¹₁₀

50% = ⁵⁰₁₀₀ = ¹₂

10% x 570
= ¹⁰₁₀₀ x 570
= 57

570 - 57 = 513

Total number of tickets sold on Tuesday 
= 9 u + 513 + 15 u
= 24 u + 513 

24 u + 513 = 1257
24 u = 1257 - 513
24 u = 744

1 u = 744 ÷ 24 = 31

Total number of tickets sold for the two days
= (10 u + 570) + 10 u + (9 u + 513) + 15 u
= 44 u + 1083
= 44 x 31 + 1083
= 2447

Amount collected from the sale of concert tickets for the two days
= 2447 x 13
= $31811

Answer(s): $31811