Please help draw a DFD diagram including below:

1) Context diagram

2) Chronologically sorted table of entity and activity with groups

3 )Level zero dfd

(Start Drawing here)

Paragraph 1: listed by sentence

Each morning the data control group begins its operation by assembling the previous day's shipping documents into batches, preparing batch totals, and recording those totals into a batch control log.(The warehouse clerks have forwarded copy 2 of the shipping document to the data control group the previous day.)

Paragraph 2: listed by sentence

In the data preparation section, a data entry clerk keys the shipping data from the shipping documents.The shipment is compared to the original sales order in the open sales order file.

If all items ordered (by customer) are not shipped, the sales order remains open or unfilled.

The sales order record (in the file) will be marked as to date of partial or full shipment.

If incorrect items are shipped to the customer, that is, no sales order exists for those items, the items are returned by the customer with the incorrect shipping document.

Sales orders that are shipped in full are marked as closed or complete.

Any errors that are discovered are corrected by the manager.

The keying operation produces a transaction file for shipments to customers and an updated open sales order file.

Shipping documents are filed.

Paragraph 3: listed by sentence

RSV Co. updates accounts receivable master file based upon shipment of items.

The shipments transaction file is processed daily to update the accounts receivable master file for sales on account.

After the updating is completed, a current accounts receivables report is produced.

This report is sent to the Controller for his/her review.

Paragraph 4: listed by sentence

The accounts receivable update program also produces an exception and summary report that is forwarded to the data control group.

Data control compares the report totals with comparable batch totals taken prior to keying.

Any errors are investigated, and corrections are processed the next day.

Control totals from the exception and summary report are recorded in the data control log.

Paragraph 5: listed by sentence

Once a month, customer statements are prepared and emailed.

The customer statements list all sales invoices for the month.

The sales invoice amounts are compared to the accounts receivable master file.

Customers of RSV Co. pay electronically using EFT.

They initiate a request for payment from their bank.

The customer's bank will transfer funds to RSV's bank to make the payment.

Confirmation of payment receipt is sent to RSV Co. from their bank.

Payment is recorded in the accounts receivable master file and the cash receipts transaction file.

The computer prints an accounts receivable aging report, which is sent to the Controller.