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The Happy Valley Utility Company uses turnaround documents in its computerized customer accounting system.

The Happy Valley Utility Company uses turnaround documents in its computerized customer accounting system. Meter readers are provided with preprinted computer forms, each containing the account number, name, address, and previous meter readings. Each form also contains a formatted area in which the customer's current meter reading can be marked in pencil. After making their rounds, meter readers turn in batches of these documents to the computer data preparation department, where they are processed by a mark-sense document reader that transfers their contents to magnetic tape.
This magnetic tape file is used as input for two computer runs. The first run sorts the transaction records on the tape into sequential order by customer account number. On the second run, the sorted transaction tape is processed against the customer master file, which is stored on a magnetic disk. Second-run outputs are (1) a printed report listing summary information and any erroneous transactions detected by the computer and (2) customer bills printed in a special OCR- readable font. Bills are mailed, and customers are requested to return the stub portion along with payment.
Customer payments are received in mail room and checked for consistency against the returned stubs. Checks are then sent to the cashier's office. The mail room provides the computer data preparation department with three sets of records: (1) stubs with compatible amounts, (2) stubs with differing amounts, and (3) a list of amounts received from customers, with out stubs. For the latter two types of records, data preparation personnel use a special typewriter to prepare corrected stubs. An OCR document reader then reads all the stubs and the computer updates the customer master file to post the payment amounts. Two printed outputs from this second process are (1) reports listing erroneous transactions and summary information and (2) past-due customer balances.
a. Draw a system flowchart of the billing operations, commencing with the computer preparation of the meter reading forms and ending with the mailing of customer bills.
b. Draw a system flowchart depicting customer payments processing, starting with the mail room operations and ending with the two printed reports.

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