See explanation below.
Explanation:
You need to configure a Unit of Measure for the box of eight units and another Unit of Measure for the single unit if one doesn't already exist.
* Navigate to item number 1000.
* Select Item > Units of Measure.
* Click New.
* In the Code field, select an appropriate code such as Carton.
* In the QTY per unit of measure field, enter 8.
* There is likely to be a default Unit of Measure for purchasing a single unit. If there isn't, click New
* again.
* Select the PCS for the Code and enter 1 for the QTY per unit of measure.