Download and unpack the
  Coffee Calculator project,
  and complete the implementation of the 
 CoffeeCalculator
 class as specified in the documentation for that class.
 The javadoc comment at the beginning of the class
 provides a general description of the class, and each method and
 constructor has a detailed comment.
 You must declare the fields and implement
 the constructor and all of the methods for the class.
 You must also create a test class and write test cases that achieve
 statement coverage for the constructor and all of the methods that you
 have defined.
You must submit your solution to this exam via WebCAT. You may submit your solution as many times as you like.