Prepare a flowchart for the following process for a credit sale.

The process begins when the sales clerk assist customers and prepares a sales invoice (original plus 3 copies). Next, if the price is different from the list price, it must be sent to the sales manager for approval. Copy #3 of the invoice is filed by the sales clerk alphabetically. The remaining copies of the invoice are sent to the credit department for approval and also where the invoice is checked for mathematical errors. The credit manager checks the credit of the customer and if the credit sale is approved, the credit manager marks the invoice as "approved." Copy #2 of the Invoice is given to the customer. If the customer sale is not approved then the sale is terminated and the invoice is marked and filed numerically. The credit department files the original copy of the invoice by invoice number and sends the other copy to shipping. In shipping, the items are pulled based on the information on the invoice and the items are sent to the customer. Then the invoice is filed numerically.