Improving Purchases and Sales sheets

At https://docs.google.com/spreadsheet/ccc?key=0AmY3HgUDDM9kdEs1Tzg0cE92T2x3MEtwX0NrQk9pR2c - how to best restructure the Purchases and Sales sheets (for ecommerce - apparel)? How do the pros do it? I also feel they ought to be more interconnected, but that I’ve failed to model that somehow.

Thanks in advance!

All the best,
Mikkel

I don’t know what you expect us to do with your spreadsheet… I think that the direct benefits are obvious… but the how is very dependant on the original sheet…

I guess it is a matter of creating new versions and testing.