On July 15, 2022, Carl received 50 shares of stock as an inheritance from his father, who died April 15, 2022. His father's adjusted basis in the stock was $50,000. The stock's fair market value on April 15, 2022, was $65,000. On July 15, 2022, its value was $70,000, and on October 15, 2022, it was $80,000. The alternate valuation date was not elected on the federal estate tax return. 

What is Carl's basis in the inherited stock?