On Friday, 650 more men than women attended a concert. On Saturday, the number of men decreased by 50% and the number of women increased by 80%. 808 audience attended the concert on Saturday. If each ticket cost $19, how much money was collected from the sale of concert tickets on Friday?

	Men		Women
Comparing between the men and the women at first	650 more
Before	2x5	+ 650	5x2
Change	- 1x5	- 325	+ 4x2
After	1x5	+ 325	9x2

	Men		Women
Before	10 u + 650		10 u
Change	- 5 u - 325		+ 8 u
After	5 u + 325		18 u

50% = ⁵⁰₁₀₀ = ¹₂

80% = ⁸⁰₁₀₀ = ⁴₅

50% x 650
= ⁵⁰₁₀₀ x 650
= 325

650 - 325 = 325

Total number of tickets sold on Saturday 
= 5 u + 325 + 18 u
= 23 u + 325 

23 u + 325 = 808
23 u = 808 - 325
23 u = 483

1 u = 483 ÷ 23 = 21

Total number of tickets sold on Friday
= 10 u + 650 + 10 u 
= 20 u + 650
= 20 x 21 + 325
= 745

Amount collected from the sale of concert tickets on Friday
= 745 x 19
= $14155

Answer(s): $14155