I have a workflow rule that sums 4 different fields and then updates the Amount field.   I would like to add a validation rule that says the Amount field can't be blank if the Stage is beyond Tracking.   Since the validation rule fires before the workflow rule, it is always sending the Error Message.   I tried to use the OR statement for each of the fields, but it did not work.  Any Ideas?

I have a workflow rule that sums 4 different fields and then updates the Amount field.   I would like to add a validation rule that says the Amount field can't be blank if the Stage is beyond Tracking.   Since the validation rule fires before the workflow rule, it is always sending the Error Message.   I tried to use the OR statement for each of the fields, but it did not work.  Any Ideas?