Absolutely free

[Killer]

Once a man went to a grocery and asked for a packet of margarine. The owner gave one and attened to another custermer.The owner noticed that man was examining the packet and he suddenly asked
"where is the free thing that comes with this?" Then the owner said
"there is nothing free with that packet" but the customer insised that he should give, what will come free with that packet.
Then the owner checked the margarine packet and it said "cholestorol free"