I'm building an quote tool for our sales people and I run into an issue.
Have 2 sharepoint lists
Productlist

PriceList

Depending on the type of flat product and site your price of a flat can be different.
So when the sales select the product "basisprijs 1ste bewoner" and they selected the flat type B he should lookup in the pricelist the price of the article and let show the prijsB.... if the type of flat is c the field prijsC. But if there is a PrijsAlgemeen it should overrule the detail price .... (normally you only have or a PrijsAlgemeen of a PrijsA PrijsB .... you can not have PrijsAlgemeen and PrijsA ...)
I load the screen I create a Collection that will hold all correct products that can be sold on that site and a full price collection...
how to fix it ???