The stadium tickets are priced at $16 and $13.  The number of $16-dollar tickets available is  2²₅ that of the number of $13-dollar tickets. 3 out of 5 of the $16-dollar tickets and all the $13-dollar tickets were sold. The ticket sales amounted to $5406. How much more would have been collected if all the tickets were sold?

	$16	$13
Comparing $16 and $13 tickets at first	12x5 = 60 u	5x5 = 25 u
Before	5x12 = 60 u
Change	- 3x12 = - 36 u	- 25 u
After	2x12 = 24 u	0 u

The number of 16 tickets at first is repeated.  Make the number of 16 tickets the same.  LCM of 5 and 12 is 60.

2²₅ = ¹²₅

Number of $16 tickets : $13 tickets = 12 : 5

	$16	$13	Total
Number	36 u	25 u
Value	$16	$13
Total value	576 u	325 u	$5406

Total amount collected from the sale of the sold tickets
= 576 u + 325 u
= 901 u

1 u = 5406 ÷ 901 = 6

Number of $16-tickets left unsold
= 24 u 
= 24 x 6
= 144

More amount to be collected if all the tickets were sold
= 144 x 16
= $2304

Answer(s): $2304