public static void Main()
decimal uplft = Convert.ToDecimal(25) / 100;
Console.WriteLine("Unit Increment: " + uplft);
decimal BilledAmt = (Convert.ToDecimal(price) * (1 + uplft));
Console.WriteLine("Billed Amount: " + BilledAmt.ToString("0.00"));
decimal Quantity = Convert.ToDecimal(qty);
Console.WriteLine("Unit: " + Quantity);
decimal BilledTtl = Convert.ToDecimal(Quantity * BilledAmt);
Console.WriteLine(BilledTtl);