I have a pet sitting business, and one of my regulars has moved house but still wants me to look after her rabbits. She says she is happy to pay me for the petrol as it is now almost 10 miles away from my house whereas before it was just over 3 miles and included in the rate within my radius.
I thought I would charge her the difference between the old and new properties, 6.6 miles. But as I've never charged for petrol before, I don't know how much to ask for. It's a one-off as she's been a regular for a long time with different animals, so I want to keep doing this.
What would anyone suggest please? Thanks.