Theme/apps - average price per product each size

Store Design
1

Are there any theme/apps (on product collection page& product page) that can show average price per product of each size? I want to show my customer buy 24cans of drink are better price than 6cans.

For example - product collection page:

Collection page
Collection page190×132 5.85 KB

For example - product page:

product page.jpg
product page.jpg591×282 22.9 KB

2

doesnt have to be theme, if there are any apps can do as well… thanks