Friday night funny

A farmer drove to a neighbor's farmhouse and knocked at the door.
A boy, about 9, opened the door. "Is your dad or mom home?" said the farmer.
"No, they went to town."
"How about your brother, Howard? Is he here?"
"No, he went with Mom and Dad."
The farmer stood there for a few minutes, shifting from one foot to the other, mumbling to himself, when the young boy says, "I know where all the tools are, if you want to borrow one, or I can give Dad a message."
"Well," said the farmer uncomfortably. "No, I really want to talk to your Dad, about your brother Howard getting my daughter Suzy pregnant".
The boy thought for a moment, then says, "You'll have to talk to my Dad about that. I know he charges $500 for the bulls and $150 for the pigs, but I have no idea how much he charges for Howard.