Michaels Corporation expects earnings before interest and taxes to be $$50,000$ for the current period. Using the flat corporate tax rate of $21\%,$ compute the firm's earnings after taxes and earnings available for common stockholders $($earnings after taxes and preferred stock dividends, if any$)$ under the following conditions:

$1.$ The firm pays $$12,000$ in interest.

$2.$ The firm pays $$12,000$ in preferred stock dividends.