On Saturday, 230 more men than women attended a concert. On Sunday, the number of men decreased by 40% and the number of women increased by 50%. 1314 audience attended the concert on Sunday. If each ticket cost $7, 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	230 more
Before	5x2	+ 230	2x5
Change	- 2x2	- 92	+ 1x5
After	3x2	+ 138	3x5

	Men		Women
Before	10 u + 230		10 u
Change	- 4 u - 92		+ 5 u
After	6 u + 138		15 u

40% = ⁴⁰₁₀₀ = ²₅

50% = ⁵⁰₁₀₀ = ¹₂

40% x 230
= ⁴⁰₁₀₀ x 230
= 92

230 - 92 = 138

Total number of tickets sold on Sunday 
= 6 u + 138 + 15 u
= 21 u + 138 

21 u + 138 = 1314
21 u = 1314 - 138
21 u = 1176

1 u = 1176 ÷ 21 = 56

Total number of tickets sold for the two days
= (10 u + 230) + 10 u + (6 u + 138) + 15 u
= 41 u + 368
= 41 x 56 + 368
= 2664

Amount collected from the sale of concert tickets for the two days
= 2664 x 7
= $18648

Answer(s): $18648