Originally posted by johorse@Jun 23 2005, 04:50 AM
SNIP

My problem is that to get the attribute price, I have to subtract 10% from it - otherwise it displays at a further 10% higher

SNIP
I don't understand what you are trying to achieve.

Surely the options also need tax applied to them?
In which case you enter them as exc. tax.
Or you could turn tax off and leave it until checkout.

There is also a store option to show tax in admin (as oopsed to public store). I'd turn that off IMHO. We need to work exc. tax for trade pricing to make sense.

But I'm thinking you are forgetting the (mysterious) 1 offset.

Do you agree that 10% surcharge is;

factor 1.1 with offset of 1.

That gives 110 for a base price of 100. Which is correct for 10% surcharge.

(15% discount is 0.85 with an offset of 1.0)

Does that help at all ?