Job description
A store with 1 product? that's not quite right, because there will be 1 lead product (i.e. box), but in a million versions. On top of that, with 4-5 similar class of side products to fill the site/positioning.
The site was created (www.kartonshop.pl), it works, but all this was created in great pains (about 12 months) and the pain continues. In general, it is not very interesting and hard to make an order based only on the site. Currently, the person making the site does not know how to/does not want to make changes (or in other words: makes changes, but every small change is months). That's why he wants to do the whole thing from scratch, but better, in a reasonable timeframe.
The most important functionality is the so-called calculator, which calculates the price dynamically (that's what a million versions are about). You can see here https://kartonshop.pl/sklep/fefco-f201/ I have a simple Excel file with the mechanism for this (I add in the attachment).
I would like to get a general quote because I probably gave too little information about the scope of work.