Caesar & Company reacquired 50,000 shares of its common stock for $12 per share on March 1. On April 1 they sold 11,000 shares for $18 per share. On May 1 they sold 6,000 shares for $7 per share. Assuming no prior balance in the Additional Paidin Capital from Treasury Stock Transactions, what is the ending balance in this account following these transactions?

The answer is 36000 credit. I want to know how to calculate.