Visitor Visa - B2

Today 8-04-2014 was my interview at karachi embassy Pakistan.
My question is if any one can help and tell me what did i said wrong in my interview.
I applied B2 visa for tourism purpose along with my wife and daughter 10 months, iam 31 years old and run a bussiness of my own with a income of 5 to 10 lakh rupees per month,
i took all my documents like bank statements income tax returns but the visa officer didnt bother to see any of the documents and rejected me with 214/b

V/O: Gud morning
ME: Gud morning

V/O: why do u want to go to America?
Me: For tourism purpose

V/O: wher will you go in america?
Me: To new york , Houston, Chicago

V/O: what is your Daughter age?
Me: 10 or 11 months, i was confused but my wife told me slowly 10 months than i replied 10 months.

V/O: Do u hav any relatives in america?
Me: No,

V/O: Do you have any friend in america?
me: No

V/O: (To my wife) same question any relative or freind in USA?
my wife: No

V/O: how much your trip will cost u?
me: i said under 2 million Pak rupess ( and visa officer look at me like if i said some thing wrong)

V/O: What do you do for living?
Me: i run my own bussiness

V/O: what is your business?
me: iam distributor of petroleum products and lubricants (oil),

V/O: how many employees u have?
Me: 15 in this city and 3 to 4 in every city of pakistan

than the visa officer left her seat and went inside like she wanted to discuss my case with some one inside,
she was back with in 2 mins,

V/O: (again same question) how much u r trip will cost u?
me: (again the same answer) under 2 million pak rupees.

V/O: where do u live in karachi?
Me: xxxxx town.

V/O: your visa is not approved.
Me: ok, but any reason ?

V/O: it is in form
me: ok thx.

and i was given a form of 214/b and another form was of my travel history which was filled by the visa officer
my travel history was 2005 UAE (dubai)
My wife and daughter travel history was nil.
please if any one can help that what was actual wrong done by me in this interview.
should i apply again or not?