This can be stated in active form. Alternate translation: "So people sold a measure of fine flour for a shekel and two measures of barley for a shekel" (See: [[rc://en/ta/man/translate/figs-activepassive]])
Here the word "measure" translates the word "seah," which is a unit of dry measurement equal to about 7 liters. Alternate translation: "7 liters of fine flour ... 14 liters of barley" (See: [[rc://en/ta/man/translate/translate-bvolume]])
A shekel is a unit of weight equal to about 11 grams. Alternate translation: "about 11 grams of silver" or "one silver coin"(See: [[rc://en/ta/man/translate/translate-bmoney]])