commentator, n.Definitions

The Commentator (n.) should ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠remember the whole book sells for five denarii; does he suppose its interpreter is worth more?