[Koha-bugs] [Bug 10613] Gst is not calculated correctly on the invoice page

[bugzilla-daemon at bugs.koha-community.org]

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=10613

--- Comment #11 from mathieu saby <mathieu.saby at univ-rennes2.fr> ---
It is not working well, and most of all, improving the display of rrp and ecost
price on invoices is maybe a loss of time.

The prices that we MUST have on invoice page are the prices based on unitcost,
aka the real cost of the item, entered at receipt stage.
Other prices (rrp/ecost could be displayed but they are not needed)

What we absolutely need in library is: 
- unitprice HT
- tax on unitprice HT
- unitprice TTC
- quantity
- unitprice TTC * quantity
with clear labels on header of table to show at first glance is a price is with
or without tax


Here are my tests :

1st test : 

with no/no parameters, and an order for a  book costing 100 euros in vendor's
catalog (so 100 euros without tax), invoice gives me this :

RRP : 100
Est : 90
Total : 90
=> OK if RRP and Est are without taxes
=> KO if RRP and Est are WITH taxes

in the bottom of the invoice table, I read that :

Total tax exc.    100.00         1    90.00     
Tax (5.50%)    5.50              5.50     
Total tax inc. (EUR)    105.50         1    105.50     
Total + shipment cost (EUR)              1    105.50     

As we don't pay taxes, the taxes should not be displayed here.

2d test :
with yes/yes parameters, and an order for a  book costing 100 euros in vendor's
catalog (so 100 euros including tax), invoice gives me this :


Invoice details
RRP    Est.    Qty.    Total
100     90      1       90
We don't know if RRP and Est are with or without tax
=> OK if RRP and Est. are WITH tax
=> KO if RRP and Est. are WITHOUT tax

in the bottom of the invoice table, I read that :

Total tax exc.    94.79         1    94.79     
Tax (5.50%)    5.21              5.21     
Total tax inc. (EUR)    100.00         1    90.00     
Total + shipment cost (EUR)              1    90.00     

The total tax. exc. and the tax are the values calculated on public price
(rrp).
That's not good, Most of time, we don't need them at all. It could be
displayed, but only as an indication, and with clear mention that it is based
on RRP price.
What we need here is the ecost price without tax.

Mathieu

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