To create a context diagram based on the information you've provided, follow these steps:

Start with a large rectangle or oval in the center of the page, representing the "Bargains Galore System." Label it as "Bargains Galore System."

Draw arrows from the "Bargains Galore System" to three external entities located outside the central rectangle. Label these external entities as follows:

"Customer" $($representing the interaction with customers$)$

"ERP System" $($representing the interaction with the ERP system$)$

"Credit Card Company" $($representing the interaction with the credit card company$)$

Connect these external entities with the "Bargains Galore System" using arrows to indicate the data flows. Label the arrows according to the data flows you've described. For example:

From Customer to Bargains Galore System: "Customer Input Data"

From Bargains Galore System to ERP System: "Online Catalog Request" and "Inventory Update"

From Bargains Galore System to Credit Card Company: "Credit Card Authorization" and "Transaction Data"

From ERP System to Bargains Galore System: "Inventory Information" and "Sales Confirmation"

From Bargains Galore System to Customer: "Order Confirmation" and "Order Details"

Ensure that the arrows show the direction of data flow from the source to the destination.

Your context diagram should visually represent the Bargains Galore Limited system as a central process, its interactions with external entities, and the data flows between them. You can use drawing software or tools like Microsoft Visio, Lucidchart, or even simple drawing software to create this diagram based on the textual description provided.