Sheffield Co. had retained earnings of $19900 on the balance sheet but disclosed in the footnotes that $2800 of retained earnings was restricted for building expansion and $800 was restricted for bond repayments. Cash of $2200 had been set aside for the plant expansion. How much of retained earnings is available for dividends?a. $12,000.b. $13,000.c. $15,000.d. $10,000.