Would it be possible to design a group that works like the Taxing group but for Items? The item card would have a Tariff area where you could put a check mark on that would make the Item a Tariff item. Then there would be a drop down that would let you pick the percentage Tariff that would apply to that item. When a Quote / Contract / Purchase Orders would be created, only the items with Tarifff selected would then total an amount with mark up and show at the bottom on a sub total line, like taxes. This would be handy when a Quote / Contract / Purchase Order has many items on it but only a few have Tariffs applied.