Possibly:
- allow nulls in the 2 fields and add a field to your table where you only enter full price on no labor/no material jobs. Jobs with labor/materials are summed on the form as usual and the full price field should be Null for those job records. You would need an additional textbox on your form to show the stored cost from this additional field. If labor/material fields are null, disable or hide your existing calculated field. Or are you storing the full price already (which you should not be doing)?
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.