Process $1$: Each customer comes to the counter to request a fish order. The order is submitted to the sales clerk using a paper form that the customer fills out. The seafood order is then assembled for the customer $($e$.$g$.,$ the order is packaged$).$ For purposes of this exercise, we can assume that orders can always be filled. Also, we can assume that the sales clerk assembles the order. The sales clerk then creates a simple hand written sales slip that is prepared using a paper pad that can create "carbon copies" of a sales slip $($i$.$e$.,$ the original sales slip, plus a carbon copy$).$ The carbon copy of the sales slip is given to the customer along with the seafood. This sales slip is for the customer's records. The original copy of the sales slip is not given to the customer, but is instead stored by the sales clerk in a large cardboard box on a shelf next to the cashier's counter. The box holds all of the sales slips for the day.

Process $2$: At the end of the day, after the store has closed, the sales clerk removes all of the sales slips from the box and calculates information relating to the sales for the day. Specifically, a simple summary report of the total sales $($e$.$g$.,$ sales by types of seafood, sales by customer$)$ is prepared by the sales clerk and is given to the general manager of the Bellingham Fish Company. Once the daily sales report is completed, the sales clerk puts all of the sales slips into a manila envelope and hand delivers the envelope to the accountant.

Process $3$: Upon receiving the manila envelope of information, the accountant immediately examines the information on each sales slip to check for calculation mistakes. If a calculation mistake exists, then the error is corrected. She makes a notation on each sales slip to indicate that the sales slip has been examined and then stores the verified sales slip information in a large black file cabinet located in the back corner of her office.

Process $4$: At the end of the week, the accountant retrieves all of the sales slips collected over the week to prepare a weekly billing statement for each customer. Upon completion, each of these billing statements is sent via e$-$mail from the accountant to each customer who has made a purchase during the previous week.

What you need to do:

Assume that the processes performed by the sales clerk and the accountant are internal to the system, while the processes performed by the customer and the general manager are external to the system. Assume that the data stores mentioned in the scenario are internal to the system.

Please prepare a Level$-0$ data flow diagram. To get full credit, please create the Level$-0$ DFD using four processes $($as suggested by the subheadings provided above$).$ When preparing your Level$-0$ DFD$,$ be sure to label all components of your diagram clearly.

PLEASE DRAW DIAGRAM