A Jew was walking on Regent Street in London and stopped in to a posh gourmet food shop. An impressive salesperson in morning coat with tails approached him and politely asked, May I help you, Sir?

Yes, replied the customer, I would like to buy a pound of lox.

No. No, responded the dignified salesperson, You mean smoked salmon.

Okay, a pound of smoked salmon.

Anything else?

Yes, a dozen blintzes.

No. No. You mean crepes.

Okay, a dozen crepes.

Anything else?

Yes. A pound of chopped liver.

No. No. You mean pate.

Okay, said the Jewish patron, A pound of pate. And, he added, Id like you to deliver this to my house next Saturday.

Look, retorted the indignant salesperson, We dont schlep on Shabbos.