...kinda what I just did, only in the most polite, non-confrontational and no peeing on it way NTimevan (your posted pic). I countered the offer, he baulked...i said " it's REALLY okay...you can just say No OR Yes, it's OK, it's a lovely Autumn Day and we're both alive and breathing!" I'm a fairly happy, easy going, intelligent woman.
He didn't know what to say, wanted to pull me into his usual heated debate (1 of 2 that do this out of 20 very nice folk on the other end of the line) and I kept putting my turn signal on so to speak, using my happy voice and then he asked how I calculated my offer. "In my head" I said very nicely! Ya but. "I'm not here to argue or debate, and it's ok to give this one to the next waiting 3 Skid Sprinter. It's really okay!" He said "why do you keep saying, it's okay?" ..."why not?" Okay, he said, thanks, Click.
Not gonna be sucked in to a senseless argument over a few extra bills this early in the morn!