Assume That for Local Telephone Calls,one Pays the Same Rate

Multiple Choice

Assume that for local telephone calls,one pays the same rate each month. However,for long distance telephone phone calls,the costs depend on how many long distance calls were made,what time of day they were made,and the length of each call. What type of costs are the long distance calls to the consumer?

A) Fixed.
B) Variable.
C) Standard.
D) Hidden.
E) Dependent.