Maren received 11 NQOs (each option gives her the right to purchase 11 shares of stock for $9 per share) at the time she started working when the stock price was $7 per share. When the share price was $16 per share, she exercised all of her options. Eighteen months later she sold all of the shares for $21 per share in 2023. How much tax will Maren pay assuming she is single and her taxable income is $502,600 in 2023? (Do not use dollar sign or other punctuation.)