John Lightfoot on Luke 16:6

[Take thy bill, &c.] That is, "Take from me the scroll of thy contract, which thou deliveredst to me; and make a new one, of fifty measures only, that are owing by thee." But it seems a great inequality, that he should abate one fifty in a hundred measures of oil, and the other but twenty out of a hundred measures of wheat; unless the measures of wheat exceeded the measure of oil ten times: so that when there were twenty cori of wheat abated the debtor, there were abated to him two hundred baths or ephahs.