Solve for the missing sides and angles

Side b has a length of 280 units
Angle B measures 57.89 degrees
Side c has a length of 303 units

Coordinates are always labeled in this general layout:

Angle C measures 66.43 degrees
Side a has a length of 273 units
Angle A measures 55.68 degrees

A is at coordinates (161, 275)
B is at coordinates (0, 18)
C is at coordinates (273, 18