DQ 01 The two most widely used billing systems are (1) pre-billing systems and (2) post-billing systems.

1. 1. Discuss the conditions under which each of these billing systems is most appropriate.
   2. Discuss the relative advantages of each of these billing systems from the standpoint of both the selling company and the customer.

DQ 02 Pre-billing sounds like the type of process used for catalog and Internet sales. Do you agree? Discuss fully.