Add option for an Adder based on Size or another variant chosen.

In our case, this would be to offer a clear coat/overlaminate for signs which will be priced according to the size of the sign chosen by the customer. This feature is common throughout online stores which sell aluminum-based signs and surely in similar scenarios in additional industries. This would be a little different than setting up additional variant inventory.

As an example of what we are looking to do, please see:

www.myparkingsign.com
search for R5-1 Do Not Enter sign
see step #4 “Select Adder…Laminate”