Is there a reason the Vendor sends multiple invoices for the single shipment, aside from 1 invoice for the product and 1 invoice for the duty/freight? I might try and request a single invoice for the product portion, and then you should be able to simply use the standard Landed Cost (LC) functionality. Or couldn't they just enter the multiple invoices as a single invoice in Sage, along with LC - even though you stated ""without merging""?