On Friday, 100 more men than women attended a concert. On Saturday, the number of men decreased by 10% and the number of women increased by 60%. 1240 audience attended the concert on Saturday. If each ticket cost $18, 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	100 more
Before	10x1	+ 100	5x2
Change	- 1x1	- 10	+ 3x2
After	9x1	+ 90	8x2

	Men		Women
Before	10 u + 100		10 u
Change	- 1 u - 10		+ 6 u
After	9 u + 90		16 u

10% = ¹⁰₁₀₀ = ¹₁₀

60% = ⁶⁰₁₀₀ = ³₅

10% x 100
= ¹⁰₁₀₀ x 100
= 10

100 - 10 = 90

Total number of tickets sold on Saturday 
= 9 u + 90 + 16 u
= 25 u + 90 

25 u + 90 = 1240
25 u = 1240 - 90
25 u = 1150

1 u = 1150 ÷ 25 = 46

Total number of tickets sold for the two days
= (10 u + 100) + 10 u + (9 u + 90) + 16 u
= 45 u + 190
= 45 x 46 + 190
= 2260

Amount collected from the sale of concert tickets for the two days
= 2260 x 18
= $40680

Answer(s): $40680