How do hand calculate the real power.

I can work it out but cant get the right answer can someone help....

I know the formula is P=V.I.Cos(ange)

i know to find angle:

Z=R+jX

X=XL-XC

i get X to equal 3.267e-4 ohms.

therefore Z = 0.25 + j3.267e-4

so the angle is 0.0749

i know how to find current:

V=IZ

115/0.25+j3.267e-4

I=460

so real power = 115 x 460 x cos (0.0749) = 52900 W but the answer is 59113 W