A man walks into a bar and orders 10 pints of lager followed by 12 shots of vodka

A man walks into a bar and orders 10 pints of lager followed by 12 shots of vodka

The barman then watches, amazed, as the bloke downs them one after the other. Recovering, the customer says:

'I shouldn't have done that with what I've got.'

'What have you got?' Asked the barman.

The customer looked at him guiltily. 'Oh, about two dollars.'