With uniform annual rates, some people make 200 calls a day, others make none. To young clerks using the phone to kill time, night owls playing recorded music and others accustomed to spending as much time as they want on the phone, the new system of charging for each call is a serious matter. The proof is a dramatic drop in calls when the unit call system is introduced. Charges, however, are not collected on the spot, and as time passes calling volume recovers. When the bill finally arrives, quite a number of people are astounded at the expense and appear to choose delinquency.