I will continue to charge the same amount for the items when VAT registered, so I would have had to ammend the prices down, otherwise they would appear to have gone up by the VAT rate when applied? The fact that an element of the sale price then become vat is offset by the fact that I payed the vat when I bought the items.

This aside, because it is slightly off topic initself anyway, there still exists a calculation issue and whilst the currency is displayed to 2 decimal places calculations made within the code do not honour this as outlined in my first post where I show how it has calculaed it. There must be somewhere I can change the precision on the price before it is subjected to the quantity multiplier.

I could see this being an issue generally when people are using multiple currencies?