I am super fresh when it comes to Sage 100.  I am learning as I go along.  I have been doing T&M invoicing.  Most recently we have a job that was not to exceed a certain amount and we are over on customer cost.  From what I can tell I can mark job costs as non-billable to not have them on the invoice to the customer.  What does this effect?  Will it mess up any payroll or journal entries (when certain costs credit one account and debit another account number).  Would it make more sense to take the markup out?  Or would it make more sense to mark them all as billed and just make a manual invoice?  What does that effect if I were to do it that way? I'm not sure what to do here and need some guidance.  Thanks