foreach (DataGridViewRow Datarow in dataGridView2.Rows)
            {
                if (Datarow.Cells[0].Value != null && Datarow.Cells[1].Value != null)
                {
                     string contentValue1 = Datarow.Cells[0].Value.ToString();
                    MessageBox.Show(contentValue1);
                    string query = $@"SELECT AVG(Price/Number_of_Products)
                                      From Products_in_Check JOIN Product
                                      ON Products_in_Check.Product_Code = Product.Product_Code
                                      WHERE Product.Product_Name = {contentValue1}";
                    string connection_str = @"Data Source = .\SERVERBOGOV; Initial Catalog = beershopbd; Integrated Security = True";
                    using (SqlConnection connection = new SqlConnection(connection_str))
                    {
                        connection.Open();
                        SqlCommand command = new SqlCommand(query, connection);
                        SqlDataReader reader = command.ExecuteReader();
                        if (reader.HasRows)
                        {
                            while (reader.Read())
                            {
                                object temp_price = reader.GetValue(0);
                                check = check + (float)temp_price;
                            }
                        }

                    }
                }

            }