Solve for the missing sides and angles

Angle B measures 72.56 degrees
Angle A measures 17.44 degrees
Side c has a length of 261 units

Coordinates are always labeled in this general layout:

Side b has a length of 249 units
Side a has a length of 78 units
Angle C measures 90 degrees

A is at coordinates (78, 275)
B is at coordinates (0, 26)
C is at coordinates (78, 26