How to get net price in xml feed

Hi all!

Please help me in a problem I can’t fully understand right now.

I have a perfectly working furniture webshop
My suppliers only give me gross prices for the products, that wasn’t an issue until now, I was only using the gross prices to display in the webshop.

But going forward I would like to advertise my webshop on other sites these sites require xml feeds for displaying my products.
In my xml feed they require net prices and gross prices to show, but since I only have gross prices, my xml feed looks like this:

<product>
<identifier>31641</identifier>
<name>Clark forgószék</name>
<category>Forgószékek, Irodai forgószékek</category>
<price>28200</price>
<net_price>28200</net_price>

The problem is that the net price and the gross price are identical.

(In Hungary we have 27% tax, that is 21,26% of the gross price.
So this means: net price=gross price*0,7874)

As I can see in the Woocommerce settings there is a way to turn on net prices, but as I can understand that means I have to always use net prices for all of my products and Woocommerce will calculate the gross price for everything. But I need it to work the other way around.

I’m not really fond of the idea to change all of my content manually or modify the base of my working webshop.

Plase help me if you have any ideas how to give my xml feed proper net prices, while keeping the gross prices to work with.

Thank you very much in advance!

Kind regards,
Tamás Simon

The page I need help with: [log in to see the link]