関連ワード:  how to sum every n rows in excel    how to sum every nth row in excel    how to sum every 5 rows in excel    how to sum every 10 rows in excel    how to add every nth row in excel    how to sum every n rows down in excel    how to add every 5 rows in excel    how to sum every nth row or column in excel    how to sum every 4 rows in excel    how to sum every four rows in excel