How to get values from user

class Program
    {
        static void Main(string[] args)
        {
            FruitShop f = new FruitShop();
            int result=f.GetTotalCost("apple", 22);
            Console.WriteLine(result);
            Console.ReadLine();

        }
    }

    public class FruitShop
    {
        public int GetTotalCost(string fruitname, int qty)
        {
            if (fruitname == "apple" && qty > 10)
            {
                return qty * 12;
            }
            else if (fruitname == "apple" && qty <= 10)
            {
                return qty * 15;
            }
            else if (fruitname == "orange" && qty > 20)
            {
                return qty * 7;
            }
            else if (fruitname == "orange" && qty > 10 && qty<20)
            {
                return qty * 8;
            }
            else if (fruitname == "orange" && qty <= 10)
            {
                return qty * 9;
            }
            return 0;
        }
    }
}