If the total product is 200 bushels and the necessary product is 80 bushels, the

If the total product is 200 bushels and the necessary product is 80 bushels, then the surplus product is ……
If in a year, one family, using 20 bushels of seed grain, 4,000 hours of labor, and no tools but their own hands, produces 100 bushels of grain, of which they customarily consume 50 bushels, and there are 100 families producing grain, then the necessary product for all families combined is ……
. Using the same amounts the net product is …..
. The new surplus product is …….