int buffer = 0;
            int sr_ball = 0;
            int counter = 0;
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                for (int j = 1; j < dataGridView1.ColumnCount - 1; j++)
                {
                    if (dataGridView1.Rows[i].Cells[j].Value != null || dataGridView1.Rows[i].Cells[j].Value != "")
                    {
                        buffer += Convert.ToInt32(dataGridView1.Rows[i].Cells[j].Value);
                        counter++;
                    }
                }
                sr_ball = buffer / counter;
                dataGridView1.Rows[i].Cells[57].Value = Convert.ToString(sr_ball);
                sr_ball = 0;
                counter = 0;
                buffer = 0;