Please follow the steps to add and categorize inventories:
Step 1 : After logging in, go to Admin >> Asset & Inventory Tracker >> Inventories>> Set Up >> Add all the Inventory Categories. for e.g. Diesel,papers etc.
Step 2: Once the categories are added, they will appear in the inventory tab along with the units
Step 3: For the particular Inventory, click on View to keep a track of the inventory(You can add more units to your existing inventory quantity as well remove the units which are consumed).