Console.WriteLine("Whats cost of the item?");
double cost = double.Parse(Console.ReadLine());
Console.WriteLine("whats the money given?");
double moneyGiven = double.Parse(Console.ReadLine());
if (cost > moneyGiven)
    Console.WriteLine("insufficient funds");
else
{
    double change = moneyGiven - cost;
    Console.WriteLine($"The change is {change:F2}$"); //quarter - 0,25   dime - 0,10  nickel - 0,05  penny - 0,01

    double quarters = Math.Round((change / 0.25) , 0);
    Console.WriteLine($"The number of quarters is {quarters}");
    change = Math.Round(change - (quarters * 0.25) , 2);

    double dimes = Math.Round((change / 0.10), 0);
    Console.WriteLine($"The number of dimes is {dimes}");
    change = change - dimes * 0.10;

    double nickels = Math.Round((change / 0.05), 0);
    Console.WriteLine($"The number of nickels is {nickels}");
    change = change - nickels * 0.05;

    double pennies = Math.Round((change / 0.01), 0);
    Console.WriteLine($"The number of pennies is {pennies}");
    change = change - pennies * 0.01;
}