To add prices, go to your beer menu, open the section where the beer that you want to price is located, and click on it:
Choose a container size from the dropdown. Once you've done so, you can add a price:
Once you have added all the container sizes and prices you need, make sure to click the Done button at the bottom of the page:
*NOTE: Make sure prices are activated in the menu builder, otherwise they won't show up on the app: