Purchase Orders

Hello,

Interested in knowing whether anyone has come across the following and how it was handled:

Our buyers would like to be able to generate a single PO for a supplier who invoices us for both services and expenses.  The services are discountable and the expenses are not, so ideally we would like to generate a single PO with different terms set on the various lines rather than generating two seperate POs (one for the services (discountable) and one for the expenses (non-discountable).

Thanks,

Melissa