Have you tried to design the tables and relationships that you need for this yet? If so, what have you set up so far?
Will you be designing this in FileMaker 11 or 12?
On Mac or Windows?
i have the contacts,inventory (including the sub inventory items as discussed above), estimates with line items (linked to inventory) but have not started on the Shipping tables or reports as of yet. just trying to get a bit of guidence before i make a start. using filemaker pro 12 on mac
And we still need to know a little bit more about what you have. Listing the tables helps, but doesn't show us what relationships linking them have been set up.
Anything we suggest will build on and/or modify your current design so we need a clear understanding of what you have right now.