According to the Rational Rule for Sellers, the manager of this company should choose to produce _____ of output and charge a price of _____. Quantity Price Total Revenue Total Cost Marginal Revenue Marginal Cost 1 $500 $500 $400 $500 $400 2 $450 $900 $800 $400 $400 3 $400 $1,200 $1,200 $300 $400 4 $350 $1,400 $1,600 $200 $400 Group of answer choices three units; $400 one unit; $400 four units; $350 two units; $450