How Rockfeller did it

At 18 years old, Rockfeller had no money. He found an apple in the street. The fruit was dirty he cleaned it and resold it 50 cents to a man walking in the street ... with his 50 cents he bought 2 apples 25 cents each, and resold them 1$ to another man walking in the street ... with his 1 dollar he bought 4 apples, and resold them of course 2$ ... at 19 years he inherited from his grandmother...