static void Main(string[] args) { Account nakov = new DepositAccount() { Balance = 20000, Customer = new IndividualCustomer() { Name = "Nakov" }, MonthlyInterestRate = 0.076m }; decimal nakovInterest = nakov.CalculateInterest(24); Console.WriteLine(nakovInterest); Account mortgageNakovAcc = new MortgageAccount() { Balance = 2300000, Customer = new CompanyCustomer() { Name = "SoftUni" }, MonthlyInterestRate = 0.086m }; decimal mortageInterest = mortgageNakovAcc.CalculateInterest(4); Console.WriteLine(mortageInterest); }