Answer: He incur $10 per share for tax purposes.
Step-by-step explanation:
Formula to calculate a gain or loss for tax purposes:
Gain or Loss for tax purposes = proceeds - cost basis
Cost per share = $ 60
After 2 for 1 stock split, the value of per share = (Cost per share) ÷2
= ($60) ÷2 = $30
Sale price of a share = $40
Since, $40 > $30, i.e. Sale price> Cost per share .So its a gain.
Gain= $40 - $30 = $10
Hence, he incur $10 per share for tax purposes.