How to calculate the unit price impact on the combinations? Maybe is a bug?

[ballashop]

Hi there, 

we use PS 1.6.1.15

the store I manage has set up all the products without VAT.

I do not understand how prestashop calculates price and unit price impacts within combinations.

 

Example (the vat is 10%):

 

1) In the first combination I have an article 001 that I sell at 12 € per piece, so:

12,00 € (without vat)

12,00 € per piece

 

2) In the second combination I have a variant of item 001-10 (10 pcs is a bundle) that I would sell at 10 € per piece so the user has a discount of 16.67%, to make it appear 100 € (10 * 10 € ) I have to change:

 

Impact on Price = 88

the calculation is: 100 - 12 € (single price) = 88 (impact on the price "increase")

so video should be like this:

 

100,00 € (without vat)

10,00 € per piece

 

Problems start here because I can not calculate the unit price at 10 €:

if, within the combination, I do not insert any different amount in the "unit price impact" field, the video looks like this:

 

100,00 € (without vat)

100,00 € per piece

 

The unit price became like the price of the combination 2

 

If I enter 0,001 at the offset (which is increase / decrease), the video will look like this:

 

100,00 € (without vat)

11,00 € per piece (11.00 € per unit is 10 + 10% VAT, so the finished price)

 

Then I deduce that:

"Impact on unit price" within combinations is shown with the product tax already applied, so it does not follow the settings without a vat.

 

So, How do I calculate the different amount if I want to show the unit price below the total discounted price?

 

like this

100,00 € (without vat)

10,00 € per piece

 

 

thanks for any reply

Edited September 17, 2017 by ballashop (see edit history)

[ballashop]

I forgot:

I do not use the default theme

but one purchased in the module prestashop sections

thanks

[ballashop]

Hi, the unit price error was a prestashop bug. Here the link about the issue:

https://github.com/PrestaShop/PrestaShop/pull/8590

On forge:

http://forge.prestashop.com/plugins/servlet/mobile#issue/PSCSX-9419

The category page still have this problem. Thanks