# a measure of fine flour will be sold for a shekel, and two measures of barley for a shekel

"people will sell a measure of fine flour for a shekel and two measures of barley for a shekel" 

# a measure of fine flour ... two measures of barley

"7 liters of fine flour ... 14 liters of barley". Here the word "measure" translates the word "seah". 

# a shekel

"about 11 grams of silver" or "one silver coin"