When you add an input to a field job then you can calculate total amount based on area and rates. This information will be added to reporting. You can add inputs in a couple of places: farm settings, and the input section of a field job.
Mobile
On the side menu select Farm settings.
Tap "Inputs" and select "+ Create new input"
Choose an input name.
Select a unit and give the input a type (Fertilizer, Seed, Spray or Other)
Tap "Create."
Web
Go to Farm Settings, by selecting the cog top right off the screen.
Select the Inputs tab.
Add an input name.
Select a unit and give the input a type (Fertilizer, Seed, Spray or Other)
Tap "Save."