The stadium tickets are priced at $24 and $16.  The number of $24-dollar tickets available is  2¹₃ that of the number of $16-dollar tickets. 3 out of 4 of the $24-dollar tickets and all the $16-dollar tickets were sold. The ticket sales amounted to $1392. How much more would have been collected if all the tickets were sold?

	$24	$16
Comparing $24 and $16 tickets at first	7x4 = 28 u	3x4 = 12 u
Before	4x7 = 28 u
Change	- 3x7 = - 21 u	- 12 u
After	1x7 = 7 u	0 u

The number of 24 tickets at first is repeated.  Make the number of 24 tickets the same.  LCM of 4 and 7 is 28.

2¹₃ = ⁷₃

Number of $24 tickets : $16 tickets = 7 : 3

	$24	$16	Total
Number	21 u	12 u
Value	$24	$16
Total value	504 u	192 u	$1392

Total amount collected from the sale of the sold tickets
= 504 u + 192 u
= 696 u

1 u = 1392 ÷ 696 = 2

Number of $24-tickets left unsold
= 7 u 
= 7 x 2
= 14

More amount to be collected if all the tickets were sold
= 14 x 24
= $336

Answer(s): $336