Taxes in "historic" promotions

[Jacques Le Roux]

A question,

Currently the 'historic" promotions (PPIP_ORST_HIST,  PPIP_ORST_YEAR, PPIP_ORST_LAST_YEAR) do not include taxes in their calculation
which uses remainingSubTotal. But, for B2C, in countries which are used to (or must) show prices with taxes (most of countries using
VAT I guess), the price the client effectively pay is taxes included (the final client will never get back taxes paid, contrary to
B2B case). So I propose to introduce a new field in ProductStore, namely includeTaxInRemainingSubTotal. If this field is set to Yes,
then in the calculation of remainingSubTotal (done in service resetGrandTotal), the taxes will be included.

Actually my question is : in order to minize the number of fields and keep them consistent maybe we could simply use
showPricesWithVatTax. It could be argued though that we really need to create the new field includeTaxInRemainingSubTotal in order
to be able to deal with B2B case. But maybe it's no really needed because we set the field showPricesWithVatTax to Yes for the same
basic reason that bring us to include taxes in remainingSubTotal calculation.

So please, what do you think ?

Thanks

Jacques