Brain Teaser's / Riddels. Number 25

1] Sabrina gave Samantha as many dollars as Samantha started out with. Samantha then gave Sabrina back as much as Sabrina had left. Sabrina then gave Samantha back as many dollars as Samantha had left, which left Sabrina broke and gave Samantha a total of $80.00. How much did Sabrina and Samantha have at the beginning of their exchange?      Pick the tomato, get the answer!

2] I know what my job is, the point has been made. You say I have a big head, and you're right, I'm afraid. Put me in my place, and then leave me alone. What I need most is someone to drive me home. What am I?    

1] Sabrina had $50 and Samantha had $30

2] A Nail