VAT on Supplier Invoices etc

If we have different amounts of VAT to pay from a supplier that are not 17.5 / 5 or 0% how do I add these as an expense items. For example our UPS / Fedex shipping bills have VAT calculated on a package basis so its always a different number to 17.5 - the same with VAT on Electricity and water bills or finally on Mobile bills when you roam abroad etc.