In January 2017, Khors Company issued nonqualified stock options to its CEO, Jenny Svaro. Because the company did not expect Ms. Svaro to leave the company, the options vest at the time they are granted with a total value of $50,000. In December of 2018, the company experienced a surge in its stock price, and Ms. Svaro exercised the options. The total bargain element at the time of exercise was $60,000. For 2018, what is the book-tax difference due to the options exercised?