Pls i hope you have seen where your errors are coming from. You forgot about the reaction force onthe crate and also the frictional force opposing the force causing the motion of the crate. Thanks
if the is a force acting opposite to the direction of motion of the crate ( frictional force= 60N) this implies that the total force pulling the crate is now; 225N - 60N =165N.
the reaction force to the floor will be= 50cos40=38.30N
Therefore, total pulling force= 165N - 38.30N= 126.7N.
Now...