Don't loose hope-2

There are a few problems here, given that the requested answer is in integer format. First, it needs to be stated that the gravitational acceleration is $10$ . And then, the answer is not actually an integer, so it needs to be stated to round to the nearest whole number.

Aside from that, we are solving a system of four equations for four unknowns. The first two equations are for mass A and the last two are for mass B.

$F_1 \approx 60.18 \\ F_2 \approx 79.86 \\ F_3 \approx 48.06 \\ F_4 \approx 263.78 \\ F_2 + F_3 + F_4 \approx 391.70$

Because you have given an integer answer, you have to give the values of $\sin 37\degree$ and $\cos 37\degree$ as $\dfrac 35$ and $\dfrac 45$ respectively.

(1) Normal reaction force between the block and the wedge is $10g\cos 37\degree=80$ N

(2) Spring force is $10g\sin 37\degree \cos 37\degree=48$ N

(3) Normal reaction of ground on the wedge is $20g+10g\cos^2 37\degree=264$ N

Therefore their sum is $80+48+264=\boxed {392}$ N.