On Thursday, 650 more women than men attended a concert. On Friday, the number of women decreased by 40% and the number of men increased by 70%. 620 audience attended the concert on Friday. If each ticket cost $19, 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	650 more
Before	5x2	+ 650	10x1
Change	- 2x2	- 260	+ 7x1
After	3x2	+ 390	17x1

	Women		Men
Before	10 u + 650		10 u
Change	- 4 u - 260		+ 7 u
After	6 u + 390		17 u

40% = ⁴⁰₁₀₀ = ²₅

70% = ⁷⁰₁₀₀ = ⁷₁₀

40% x 650
= ⁴⁰₁₀₀ x 650
= 260

650 - 260 = 390

Total number of tickets sold on Friday 
= 6 u + 390 + 17 u
= 23 u + 390 

23 u + 390 = 620
23 u = 620 - 390
23 u = 230

1 u = 230 ÷ 23 = 10

Total number of tickets sold for the two days
= (10 u + 650) + 10 u + (6 u + 390) + 17 u
= 43 u + 1040
= 43 x 10 + 1040
= 1470

Amount collected from the sale of concert tickets for the two days
= 1470 x 19
= $27930

Answer(s): $27930