Your price book can contain multiple sales prices for the same item. See the article "Flat Rate Pricing".
This article covers how you configure the price columns in your price book, and how they should be labelled.
Only users with Manager or Administrator role can configure price labels.
To configure the price labels
1. Sign in using a web browser
2. Click Items
3. Click Extra and choose Price Labels
4. Activate the number of prices you need. At least one sales price must be enabled.
Name the prices so they are easy for technicians to understand
5. Click Save
Example
The price labels were changed to "Regular", "Overtime" and "Comfort Plan". They will appear on the iPad exactly like that.