Consider a town in which only two residents, Brian and Crystal, own wells that produce water safe for drinking. Brian and Crystal can pump and sell as much water as they want at no cost. For them, total revenue equals profit. The following table shows the town's demand schedule for water.

Price Quantity Demanded Total Revenue ( Dollars per gallon) (Gallons of water) (Dollars) 3.60 0 0 3.30 35 $115.50 3.00 70 $210.00 2.70 105 $283.50 2.40 140 $336.00 2.10 175 $367.50 1.80 210 $378.00 1.50 245 $367.50 1.20 280 $336.00 0.90 315 $283.50 0.60 350 $210.00 0.30 385 $115.50 0 420 0