I sell many custom products. The nature of the custom product industry is that there is a fee tacked onto the order itself, not the products. So a person ordering custom red cups and custom blue cups has the same fee as a person ordering only custom green lids.
Is there a way to pass this information into Google so my advertised price is represented alongside that order-level fee?
I see that Google's Schema Offer reference has an
addOn section, but I think that really applies to up-selling. I am open to clever use, though.