Castle State Bank has the following financial information.

Balance SheetIncome StatementCash$$100$Interest Income$$400$Securities Investments $$600$ Interest Expenses$($$$150)$Net Loans $$1200$ Non$-$Interest Income$$50$Net Premises and Equip.$$300$Non$-$Interest Expenses$($ $$100)$ Total Assets $$2200$ Provision for Loan Losses$($$$60).$Deposits $$1100$ Pre Tax Net Operating Income$$140$Non$-$Deposit Borrowings $"$$$800$Securities Gains $($Losses$)($$$40)$Equity Capital $$300$ Taxes$($$$45).$ Total Liabilities and Equity $$2200$ Net Income $${55}^{**}$ All Purchased Funds

Use this information to calculate Castle State Bank's$-$net profit margin