I want to have the base price as zero with option 1 showing the fixed initial price and then option 2 and 3 to be % variations based on what has been selected. However Magento only calculates % price options on the base price so if I have zero as the base then % changes option 2 it make no difference to the overall price. You can see what I mean at; https://website-development-area.com/magento2/tester.html
Does any-one have a solution or know of an extension?
Any help really appreciated.