KennyGardnerIII says:
Despite my efforts, I'm still having some trouble with the nitty-gritty details of equipment costs and concepts like SINs.
Something I found helpful: https://drive.google.com/folderview?id=0B1j5wMS6KHqMZndteGkteG1yWWc&usp=sharing
Chummer5 is free software for creating shadowrun characters, I realize it is probably late to be overly helpful, but it does make keeping track of the math for little things like SINs and leather jackets manageable.
This release is in early development, but as far as I could tell seems to work smoothly. Only problem with this game in particular is the half-price motorcycle to start with, I didn't figure out how to force that in the software so I had to leave some creds behind to handle that separately.