Have your System Administrator complete the following.
Go to Setup > Lookup Tables > Stock Category in RMS.
Select 'Add' to create a new Stock Category.
Enter the Stock Category Description.
Select 'Save' to create the Stock Category in RMS.
Select 'Add' to create a Sub Stock Category.
Enter the Sub Stock Category Description.
Select 'Save/Next' and repeat as necessary.
Select 'Save/Exit' to store the changes made in RMS.