I bid a cafe remodel in a Sam's Club. The GC called me to 'talk' about my price. He said I was higher than his budget could allow. He then asked if I brought the job in under the amount of hours I had estimated could I give him a refund for some of the 'unused' hours. I asked, "If I underestimated the amount of hours needed can I bill you more at the end ?"
He said, "Yeah, that's what you all say."