Could someone please verify if this problem is done correctly please. If not where did I go wrong.

The problem:

Use the component method to find the resultant(magnitude and direction) of the forces listed below.

A 200 N at 20 degrees N of East

B 250 N at 180 deg.

C 500 N at -150 deg. S of East

My attempt at the solution:

Ax = 500 cos (-150) = - 433

Ay = 500 sin (-150) = -250

Bx = -250

By = 0

Cx = 200 cos 20 = 187.9

Cy = 200 sin 20 = 68.4

R = (-433-250+187.9)I + (-250 + 0 + 68.4)j

= (-495.1, -181.6)

R = sqrt(-495.1^2 + -181.6^2)

= 527

Tan Theta = 318.4 / 370.9

Theta = 20.1 deg.