Write a script to update prices on the website by part number

Write a script to update the prices in the catalog on the website by part number.
On site daily at 10-00 and 18-00 on FTP comes xls file from the 1C catalogue and prices.
The website on MODx evo system.

The goal is to force the system to update the prices in the catalogue in automatic mode according to the code sent from xls file.
Your budget, your deadline. Start, if possible, today.