Web based Application For Inventory Control

I need an inventory assessment tool built. I will need to have the source files/code and the ability to make changes. The site must me able to be placed on a Wix site and still function 100%. The current application is at the link below.

If I select 12 in the first drop down and 4 in the last drop down it would search all three files and if found a Part Number (Column A) with a MNS (Column C) of = or > 12 and an OH (Column B ) of = or > 1 it would match with a Part Number (Column A) with a MNS (Column C) of = or < 4

Must output to CSV
Blank cell would equal 0

https://www.thvardhan.dev/csvcon-parameter/