Correction:

I found a notational bug in the analysis as written. I inadvertently
omitted some magnitude (absolute value) signs in three of the power
equations:

The average power into the line = E1 * I1 * cos(theta), where theta =
the angle of E1 - the angle of I1 =

P1 = 11080 watts

should read

The average power into the line = |E1| * |I1| * cos(theta), where
theta =
the angle of E1 - the angle of I1 =

P1 = 11080 watts

and

fP1 = fE1 * fI1 * cos(delta) = 11070 watts
rP1 = rE1 * rI1 * cos(delta) = 0.009695 watts

should read

fP1 = |fE1| * |fI1| * cos(delta) = 11070 watts
rP1 = |rE1| * |rI1| * cos(delta) = 0.009695 watts

I apologize for the errors and any confusion it might have caused.

Roy Lewallen, W7EL