Your roommate's long hours in chem lab finally paid off—she discovered a secret formula that lets people do an hour's worth of studying in 5 minutes. So far, she's sold 200 doses and faces the following average-total-cost schedule:

  

      

  

If a new customer offers to pay your roommate $300 for one dose, should she make one more? Explain. 
 

Q Average Total Cost 199 doses $199 200 200 201 201