Go to Backhouse > Online Menus > Menu Schedules.
Click on + Create Menu or Edit on the right side of your existing menu.
In the setting of the menu, you should see the prices has been seperated into 2 prices, Takeout and Delivery.
Should you wish to set up a different price for your item for Takeout and Delivery, you can put in the prices accordingly.
When finished, hit Publish to save your settings.