Flynn, Oscar and Corwin collected stickers in the ratio of 9 : 6 : 10. After Corwin gave ⁴₅ to Flynn and Oscar, Corwin had 480 less stickers than Flynn. The number of stickers that Oscar had increased by 90%. How many stickers did Flynn and Corwin have in the end?

	Flynn	Oscar	Corwin
Before	9 u	6 u	10 u
Change	+ 2.6 u	+ 5.4 u	- 8 u
After	11.6 u	11.4 u	2 u

Number of stickers that Corwin gave to Flynn and Oscar
= ⁴₅ x 10 u
= 8 u

Number of stickers that Oscar received from Corwin
= ⁹⁰₁₀₀ x 6 u
= 5.4 u

Number of stickers that Flynn received from Corwin
= 8 u - 5.4 u
= 2.6 u

Number of less stickers that Corwin had less than Flynn
= 11.6 u - 2 u 
= 9.6 u

9.6 u = 480

1 u = 480 ÷ 9.6 = 50

Number of stickers that Flynn and Corwin had
= 11.6 u + 2 u
= 13.6 u
= 13.6 x 50
= 680

Answer(s): 680