Santa and the American

Santa and an American are sitting together in a train compartment. The American was eating some apple seeds.

After some time, Santa becomes curious and asks the American, "Why are you eating apple seeds?"
The American replied, "Apple seeds make you smart!"

Santa, even more curious, asks, "Are they for sale?"
The American answers, "Yes, of course, You can have these five apple seeds for twenty five dollars only."

Santa agreed to the deal and starts eating the seeds. Suddenly Santa turns to the American and says, "Hey, you, listen, for twenty five dollars I could have bought five kilos of apples!"

The American turns to him with a satisfied smile and answers, "Now you see -- it has started working already!"