Combine data from two XML files and export combined data

I am in need of a skilled freelancer who can combine data from two XML files and export the combined data in XML format. The project requires including all fields from both XML files and applying specific rules for combining the data.

Ideal skills and experience for this job include:
- Strong knowledge and experience working with XML files
- Proficiency in data manipulation and combining techniques
- Attention to detail to ensure accurate data integration
- Ability to understand and implement specific rules for combining the data

Here is URL to the two files:
1. with all products basic data:
https://t.ly/3cipD
where we can find the product:
<id>
<product_code>
<barcode>
<amountavailable>
<title>
<group1_name>
<group2_name>
<manufacturer>
<price>
<dealer_price>

2. Detailed product data which can be fetch for each product by product ID. For example:
https://t.ly/FrV6f

the product ID is in the URL:
https://www.vali.bg/api/v1/product/{product_id}/full/?api_token=xxxxxxxxxxxxxxxxxxxx
Where is the detailed data for each product and images.

We need to create a new HTML description by parameters:
Description_BG from the name of Bulgarian parameters and data.
Description_EN from the name of English parameters and data.

and the data from the both to be exported to a new file which contain all important data for the products (one file for all products).

If you have any questions please ask before bidding.

ONLY FINAL BIDS!!!!