The computer Warehouse sells computer hardware, software, and supplies (such as paper). Individual customers just walk into the store, select merchandise, and must pay for their purchases in full before leaving the store. Corporate customers, however, call in orders in advance, so that the items are waiting to be picked up. Corporate customers may charge their purchases to their account. The Computer Warehouse mails corporate customers monthly statements to summarize all purchases made the prior month. Corporate customers pay the entire balance, as listed on the monthly statement, with one check of EFT transaction. Draw an REA diagram of the Computer Warehouse's revenue cycle, complete with cardinalities