using System;

public class Program

{

    public static void Main()

    {

        var myClass = new MyClass();

        Console.WriteLine(myClass);

    }

}

​

public class MyClass 

{

    public string customerName => "Jordan";

    public string customerPhoneNumber => "867-5309";

    public double CalclateTotalCost() => (double) 12.345;

    public override string ToString()

    {       

        return ($"\nCustomer's Name:  {customerName}" + 

                $"\nCustomer's Phone Number:  {customerPhoneNumber}" + 

                $"\nTotal Cost of Purchase:  {CalclateTotalCost():C}");

    }

​

}