I am testing odoo 12 community edition with product variants.  Currently, I can set a different variant extra price for each template. For example, a "blue" attribute for shirts can be $.50 extra, and a "blue" attribute for pants can be $1.00 extra. That's nice and flexible. But it is not ideal for something like a flavor extra in a drink, for example, a shot of vanilla in a latte. This would more likely be a fixed price variant. If the price of vanilla suddenly goes up, I would currently have to change that attribute extra price in every product template that uses it.

It would be ideal to be able to set a base price for each attribute that would be used in every product template that uses that attribute.  Then, when the price of vanilla goes up, you only have to change it in one place. Does something like this exist and I just cannot find it? Or is there a module that accomplishes this? I've searched for one but haven't found one.