"Setup Units" is where the units of measure are set. For example, units of measure would be militias, gallons, ounces, etc. Most units will be in here already but if you need to you can setup additional units of measure.
Setup Units can be found in the Inventory tab.
Inventory can be accessed in the Back Office under the "Inventory" tab.
There are 3 sections. Liquid Volume, Dry Volume and Quantity
Liquid Volume
Dry Volume
Quantity
Unit Name - Name of the measurement unit.
Abbreviation - Abbreviation of the unit.
Amount (Fluid Ounces) - This number represents how many times 1 fluid ounce fits into the unit.

This is very important

- The system will allow you to purchase in one measurement and sell in another, as long as the measurements are in the same group.
- This means that the system needs to know how to convert one measurement into another. It does this by using the Amount (Fluid Ounces) number.
- Fluid ounces is the default unit. There is one fluid ounce in a fluid ounce. Where as there are 16 fluid ounces in in a pint.
Choose either Liquid, Dry, or Quantity.
Enter a Unit Name and an abbreviation into the relevant boxes.
Add how many fluid ounces are in this measure and click on "Add" The new unit will now show in the list.

When adding a Quantity, quantities are multiples of 1.