Zoe, Jane, Tammy and Sabrina jointly contributed to the cost of a present for their colleague. Zoe's contribution is ²₃ of the total contribution made by the four girls. The ratio of Sabrina's contribution to the total of Jane's and Tammy's contribution is 2 : 1. What is the total contribution by the four girls if Jane's contribution is ²₅ of Tammy's contribution and the total amount contributed by Zoe and Sabrina is $1064?

Zoe	Jane	Tammy	Sabrina	Total
2x21	1x21			3x21
	1x7		2x7
	2x1	5x1
42 u	2 u	5 u	14 u	63 u

Working backwards.

Total amount that Jane and Tammy had is the combined repeated identity.
LCM of 1 and 7 = 7

Total amount that Jane, Tammy and Sabrina had is the next combined repeated identity.
LCM of 1 and 21 = 21 

Total amount contributed by Zoe and Sabrina
= 42 u + 14 u
= 56 u

56 u = 1064

1 u = 1064 ÷ 56 = $19

Total contribution by the four girls
= 63 u
= 63 x 19
= $1197

Answer(s): $1197