Gearup2
I think I see where you have gone wrong.
If you're trying to shift weight with a C of G forward of the limit then you use flow chat also using the formula (Present Weight - 2360) x 0.27 + 2400 to find the forward C of G limit. You must use this method as you know the all up weight at T/O.
When you are adding or subtracting weight with the C of G forward of the limit you must use the graph method. You must use this method when you're still trying to determine overall T/O weight.
I hope this points you in the right direction, best of luck with your exam.