Invoice suggestion

[Fabio Coatti]

In data venerdì 20 marzo 2015 12:09:33, Derek Atkins ha scritto:
> Hi,
> 
> Fabio Coatti <fabio.coatti at gmail.com> writes:
> > Hi all,
> > I need some suggestions about how to manage invoices.
> > 
> > I have invoices that should be built like this:
> > 
> > Item					Amount
> > 
> > A					100
> > B					10% of A
> > C					20% of A+B
> > 
> > And in report I need to print the amount of A and B, like it is a tax
> > or something.
> 
> Set up B and C as two entries in a Tax Table.  Provided that B is always
> 10% and C is always 20% then you can manually compute the value C as a
> fixed percentage of A (independent of B).
> 
> You can compute the C' percentage by:
>    C(1+B) == .2 * (1+.1) == .2 * 1.1 == .22  == 22%
> 
> So you would create a tax table where
>   B == 10% of A
>   C == 22% of A (which is 20% of A+B)


Many thanks for the answer. However, that would be quite close, but if I am right in this 
way we lose the information that will allow to print, at the bottom of invoice, something like
===
tax A 10% amountA
tax B 20% amountB
===

I'm struggling to find a way to accomplish this result... or to explain myself, I fear. Another 
way to put it is that two different taxes are involved, and one of the two is applied to the 
result of the other taxation, and in the invoice both should be stated in different lines. To be 
honest, it seems a quite involved process, but I'm not in charge to decide how taxes are 
applied :)



-- 
Fabio