Billed and Billable are different. When you create a slip it is Billable, No Charge or Do Not Bill. It retains this status permanently. Billed means it was included on a bill. The yellow envelope and the Billed status mean it was billed. Sounds like everything is correct. Again you don't need to purge the slips. Since they are billed, they will not show up on another bill. If you purge them you lose the ability to create slip based reports.
↧