How do you find the sale date?

Required information Problem 12-30 (LO 12-2) (Algo) [The following information applies to the questions displayed below.] Mark received 10 ISOs (each option gives him the right to purchase 12 shares of Hendricks Corporation stock for $9 per share) at the time he started working for Hendricks Corporation five years ago, when Hendricks's stock price was $5 per share. Now that Hendricks's share price is $35 per share, Mark intends to exercise all of his options and hold all of his shares for more than one year. Assume that more than a year after exercise, Mark sells the stock for $35 a share. Note: Enter all amounts as positive values. Leave no answers blank. Enter zero if applicable. Problem 12-30 Part a (Algo) a. What are Mark's taxes due on the grant date, the exercise date, and the date he sells the shares, assuming his ordinary marginal rate is 32 percent and his long-term capital gains rate is 15 percent? Answer is complete but not entirely correct