If you use advanced tracking features in TSheets you can enter these non-time related metrics within Karbon too. From any of the time entry modules, you can select the advanced tracking category, which will allow you to enter your data or select from the drop-down options.
Need to setup Advanced Tracking in TSheets?
To install in TSheets, go to SET UP > Add-ons OR Feature Add-ons > Manage Add-ons. Under Get More, find Advanced Tracking and click Install.