What is the equation to come up with the answer ?

You know the following information about the Miller State Bank: Gross loans Miscellaneous assets Deposits Total equity Common stock par Non-deposit borrowings Investment securities Net premises Surplus Allowance for loan losses Total assets Gross premises $300 50 390 50 60 150 40 50 500 70 Given this information, what the value of this firm's undivided profits? $50 $5 $10 D. $40 $450