PHYSICS! a worker pulls a 200 N packing crate at constant velocity across a rough floor by exerting a force

a worker pulls a 200 N packing crate at constant velocity across a rough floor by exerting a force F = 55 N at an angle of 35 degrees above the horizontal. What is the normal force of the floor on the box?

PHYSICS help!!

By N = mg - Fsinθ
=>N = 200 - 55sin35*
=>N = 168.45 Newton