Show price per liter/1000 ml for products in a products prices

[Gjermstad]

Problem

For all products where Basic Details quantity/weight is a weight in grams, prices saved for the product will show "Price (price per kilo) date". But for products where quantity/weight is saved as millilitres (ml) it does not show the price per liter (only "price date").

Proposed solution

I would love for prices to show price per liter/1000 ml for fluid products. This would make it easier to compare prices to other products.

Additional context

Mockups

Part of

• 🎯 What can I work on ? (mobile app) #525

[monsieurtanuki]

cf. #6700
That said, the prices are set by unit of by kilogram. Never by liter.
I'm not sure we currently link product category and "typical unit" (e.g. kilogram or liter).