Parts categories can be used to help break up your parts inventory into smaller more manageable groups when searching for parts or tracking and reviewing inventory. The system has three default categories everyone begins with: Parts, Labor and Sublet.
These categories when used in an invoice determine where the figures will be totaled. You can define your own parts categories under File > Setup > Service > Parts Categories. Custom categories you create will be treated the same as the Parts category for the handling of totals on an invoice. Click on New to define a new category.