Two product locations, one shipping location

[dgase]

We have two distinct sets of products stored at two separate locations.

If we receive an order for a product from Location B, we take that product from Location B to Location A and ship it.

If we receive an order for a product from Location A, we ship it from Location A.

If we receive an order for products from Locations A and B, we take the product from Location B to Location A, combine it with the product from Location A and ship them both together.

At Location B, we'd like to be able to print only the invoices that have product at Location B, but easily filter out invoices that only have product from Location A.

Also, we have local pickups at Location A.