It wont give me the sales total from the mod and the tax mod is off or something

       class Program
    {


        static void Main(string[] args)
        {
            string customerName = "", state = "";
            int quantity = 0;
            double price = 0, sales = 0, tax = 0;

            Console.WriteLine("\n\nWelcome to the Sales Tax Calculator");

            Console.Write("\n\nPlease enter in the customer name:  ");
            customerName = Console.ReadLine();
            Console.Write("\n\nPlease enter in the State (NY / NJ / FL):  ");
            state = Console.ReadLine();
            Console.Write("\n\nPlease enter in the number of items purchased:  ");
            quantity = Convert.ToInt32(Console.ReadLine());
            Console.Write("\n\nPlease enter in the unit price of the item:  ");
            price = Convert.ToDouble(Console.ReadLine());



            sales = computeTotal(quantity, price);

            tax = computeTax(sales, state);

            Console.WriteLine(customerName + " your total sales are:  ");

            Console.WriteLine("Your total with taxes is:  " + tax);


            Console.ReadLine();
            
        }
        public static double computeTotal(int quantity, double price)
        {
            return (quantity * price);
        }

        public static double computeTax(double sales, string state)
        {
            double taxAmt = 0;

            if (state == "NY")
                taxAmt = sales * .04;
            else if (state == "NJ")
                taxAmt = sales * .07;
            else if (state == "FL")
                taxAmt = sales * .06;

            return taxAmt;


        }
    }
}

What I have tried:

Thank you AGAIN!!  Now when it is ran the calculations are simply not working right.  I don't know what I did.  The code in its entirety with corrections is above.  What am I doing wrong.  I tried messing with calculations but that only gave me lots of errors.  This is a tough one.

Thank you for helping with the module.  It looks wonderful. Everything looks good except the bold, underlined text above.  It keeps giving me an error of CS1503 for (state, sales)

I have tried everything I could possibly think of.  I am still learning and doing some of my brother's old work sheets from college to get a better handle on this programming stuff.