Riddle #9-Hard

Please do NOT use a calculator but you can go over it as many times as you want.

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 as 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?

Did you get it yet?
Did you figure it out?
Give up?
Alright. The answer is below.

SABRINA HAD $50 AND SAMANTHA HAD $30

Here are the reasons why SABRINA HAD $50 AND SAMANTHA HAD $30 is the answer.
Too much to say....just calculate it. That's why it's the right answer!
-Sorry I couldn't give a full explanation.

If you like this, leave a comment and give me a thumbs up!