This is as far as I got with this. I don't know how to combine the two impedance values with different phase angles. My book says nothing about this, which just blows my mind.

I don't fully understand what your telling me to do. Im familiar with the reciprocal equivalents of R, Xc, Zt..... G, Bc, and Y, but don't know what to do with that.... The phase angles of Y would still be different and and the relationship between the G's and the Bc's are still in parallel.