Mаren received 10 NQOs (eаch оptiоn gives her the right tо purchаse 10 shares of stock for $8 per share) at the time she started working, when the stock price was $6 per share. When the share price was $15 per share, she exercised all of her options. Eighteen months later, she sold all of the shares for $20 per share. What is the amount of Maren's bargain element?