What tools to take for an online calculator with loading / unloading from 1s?

Question

1C

Hello dear geeks.
Started studying programming, interested in web development (so far in optional mode). And as they say, the best learning is practice.
There is a need for a quotation calculator (commercial offers) at work.
The calculator calculates the cost of a product that consists of components (from 3 to ~200 items).
The list of components must be unloaded from 1s (more than 5000 items). And then add the finished product from the calculator to the 1s database.
Accordingly, I ask you to help with the recommendation of tools with which it is best to solve this problem.
Wishes: Cross-
platform
Online access The
fastest response
1s we have 8.
Help with the direction, and then I'll dig :) Thank you.