"Worldwide Company obtained a charter from the state in January that authorized 200,000 shares of common stock, $10 par value. During the first year, the company earned $37,500, declared no dividends, and the following selected transactions occurred in the order given"

How do I find the Reacquired 1,300 shares at $16 cash per share from stockholders; the shares are now held in treasury and reissued 650 of the shares in transaction (b) two months later at $19 cash per share? I am very confused