The zoo tickets are priced at $29 and $20.  The number of $29-dollar tickets available is  2¹₄ that of the number of $20-dollar tickets. 3 out of 7 of the $29-dollar tickets and all the $20-dollar tickets were sold. The ticket sales amounted to $10744. How much more would have been collected if all the tickets were sold?

	$29	$20
Comparing $29 and $20 tickets at first	9x7 = 63 u	4x7 = 28 u
Before	7x9 = 63 u
Change	- 3x9 = - 27 u	- 28 u
After	4x9 = 36 u	0 u

The number of 29 tickets at first is repeated.  Make the number of 29 tickets the same.  LCM of 7 and 9 is 63.

2¹₄ = ⁹₄

Number of $29 tickets : $20 tickets = 9 : 4

	$29	$20	Total
Number	27 u	28 u
Value	$29	$20
Total value	783 u	560 u	$10744

Total amount collected from the sale of the sold tickets
= 783 u + 560 u
= 1343 u

1 u = 10744 ÷ 1343 = 8

Number of $29-tickets left unsold
= 36 u 
= 36 x 8
= 288

More amount to be collected if all the tickets were sold
= 288 x 29
= $8352

Answer(s): $8352