Sorry for the double post but I just thought I would give you an example:

The individual VAT(15%) on a £0.95 product would be £0.1425 rounded to £0.14

So ten of these would be £9.50(ex) + £1.40(VAT) = £10.90 (inc)

But the VAT total shows as £1.43

I guess it is working it out something like this:
9.50 x 0.15 = 1.425 ...then rounded to £1.43

Any ideas?