To create a starting number of items in the inventory, click Inventory Management.
The Inventory Management page shows a list of items broken down by location (RNR or MKP).
There are separate products for each location. For example, there is an Airheads - RNR and an Airheads - MKP. Be very careful that you are adding inventory to the correct location!
You can toggle the view by clicking Search by Location or Search by Site. This just changes the view of the items from a list view to a grid view.
If you are on the list view (Search by Location), you will need to click on a product to expand it.
Then, click the drop-down next to Action and select Receive Supply Order.
Enter the number of starting inventory in the Units Received field.
Again, be very careful that you are adding inventory to the correct location!