The stadium tickets are priced at $23 and $17.  The number of $23-dollar tickets available is  2¹₆ that of the number of $17-dollar tickets. 2 out of 5 of the $23-dollar tickets and all the $17-dollar tickets were sold. The ticket sales amounted to $12188. How much more would have been collected if all the tickets were sold?

	$23	$17
Comparing $23 and $17 tickets at first	13x5 = 65 u	6x5 = 30 u
Before	5x13 = 65 u
Change	- 2x13 = - 26 u	- 30 u
After	3x13 = 39 u	0 u

The number of 23 tickets at first is repeated.  Make the number of 23 tickets the same.  LCM of 5 and 13 is 65.

2¹₆ = ¹³₆

Number of $23 tickets : $17 tickets = 13 : 6

	$23	$17	Total
Number	26 u	30 u
Value	$23	$17
Total value	598 u	510 u	$12188

Total amount collected from the sale of the sold tickets
= 598 u + 510 u
= 1108 u

1 u = 12188 ÷ 1108 = 11

Number of $23-tickets left unsold
= 39 u 
= 39 x 11
= 429

More amount to be collected if all the tickets were sold
= 429 x 23
= $9867

Answer(s): $9867