AAA Electrical, Inc. sells electrical parts to electrical contractors in the southeastern United States. AAA Electrical customers mail their payments attached to the stub (i.e., remittance advice) from their monthly statement to AAA Electrical accounts receivable office. An AR clerk confirms that the check amount agrees with the amount of the RA and sends the checks to the cashier. The AR clerk prepares batch totals of the customer numbers, invoice numbers, and the amount paid. The AR clerk then enters the batch totals and RAs into the computer, where the AR master data are updated to record the payment. The computer reconciles the batch totals, confirms job completion, and reports discrepancies, if any, to the AR clerk. P 11-1 for the above case,

(c) Draw a physical data flow diagram (DFD). (Hint: There should be 2 squares and 2 circles; 6 connecting lines, and 1 data master component. Be sure to correctly label each).

(d) Prepare an annotated table of entities and activities. Indicate on this table the groupings, bubble numbers, and bubble titles to be used in preparing a level 0 logical DFD. (Hint: There should be 4 columns, 2 entities, 6 activities, 2 processes. Be sure to correctly label each).