Purchase Orders - Additional add-on/allocated/pro-rated values to the P.O

It would be nice if you could have additional add-on / allocated / pro-rated values to the P.O.

Ex: If you have freight charges, a lump discount, labor and fuel surcharges all on one invoice & they need to be pro-rated across multiple inventory items.

Imported from [WISH-174] Purchase Orders - Additional add-on/allocated/pro-rated values to the P.O.