Sometimes if we receive quotes for products they are individually discounted by percentage, sometimes they just have an amount deducted off the bottom. This leads to PO's and importantly VAT not being correct. For example, i have a quote in front of me that has a government grant deduction on it which is non vatable. There is no way for me to add this to my PO other than the "Disc GBP £" box which is vatable by default, so I have to put in the net value even though the grant isn't vatable. This means my PO gross total is correct but not my net or VAT.