Sources tell Re/Code that at last Friday’s weekly Yahoo meeting, an employee asked Marissa Mayer to explain the huge payout given to recently-ousted COO Henrique De Castro, which has been estimated at anywhere between $50 million and $100 million. She told employees the cash came out of what she’d paid to hire him away from Google, but Re/Code’s Kara Swisher wonders if that explanation will be sufficient for her shareholders. [Source: Re/Code]