The goal I’m ultimately trying to achieve is to use the choice selections on my products page in wix store to populate a calculator that a customer can then use to generate a full quote.
If you are doing it through Wix Stores then in theory your checkout would be your calculator for the full quote price.
Wix do already do Price Quotes as shown here.
https://support.wix.com/en/ascend-by-wix/price-quotes
You can also already setup your own product configurator as shown here.
https://www.wix.com/corvid/example/product-configurator
Also a bulk add to cart as shown here.
https://www.wix.com/corvid/example/bulk-add-to-cart
Or a wishlist as shown here.
https://support.wix.com/en/article/corvid-adding-a-wishlist-to-a-wix-stores-site
However, if you are wanting to do it through Wix Stores, then you would probably need to get the items from the checkout using a wix stores backend event that would grab all those details and you would then need to write some code to populate your own calculator page with it.
https://www.wix.com/corvid/reference/wix-stores-backend.Events.html