Pop goes the weasily shopkeeper

It said 88p on the bottle of pop in bold manufacturer's writing.

"122p," said stout shopkeeper.

"But it says here 88p," says I.

"That's a recommended price only," says he while expanding in front of my eyes.

"Then can I recommend you charge me that."

"No."

"Why not?"

"Because I have to make a living."

I gave him 50p and he said it's not enough.

I explained the 50p signage on it was only a manufacturer's recommendation of its value and I think it's worth 200p, can I have my change please?

That's another shop I'm not welcome in and I'm thirsty.