gravity (G=mg) pointing vertically downward;
normal force Fn, normal to the ramp;
friction, Ff=mu *Fn parallel to the ramp and opposite to the velocity of the box
pull Fp, parallel with the slope.
Decompose each forces into components parallel and perpendicular to the ramp. Both the parallel and normal components have to cancel. The normal component of G is opposite to Fn, G-Fn=0, from that you get Fn, and the force of friction. Do you pull the box up or down the ramp?