Indian restaurant had an emergency. I told him emergency rate is £150 first hour, and I'll be out in 20 mins.
He then said its not that much of an emergency. But it needed dealing with urgent.
I said Tuesday £90 per first hour then £90 after that.
He come back to me, and said the repair will take no more than an hour so so please come Monday @ £90 in total.
Firm no from me.
A week later he had a real emergency just before opening. I wasn't getting into another bartering exchange, so I said no can't do.