Extra charge

Two brawny men came to my house to install some new floor covering in the kitchen.
Once they had moved the cooker and refrigerator out of the way, it was not long before the job was done. As they were getting ready to leave, I asked them to put the heavy appliances back in place.
The two men demanded £45 for this service, stating it was not in their contract.
I really had no choice but to pay them.
As soon as they left, however, the doorbell rang. It was the two men.
They asked me to move my car, which was blocking their van.
I told them my fee: £45.