private static void testing(double rate, int bal, int term, int num_payments, string expected)
{
string ans = Finance.Amort(rate, bal, term, num_payments);
Console.WriteLine("rate: {0}, bal: {1}, term: {2}, num_payments: {3} expected: {4}",
rate, bal, term, num_payments, expected);
Assert.AreEqual(expected, ans);
}
