9. Use the Retailer Customers table and the Sales before June 30 query to create a new query in Design View. Include customer # and customer name from the Retailer Customers table and the Revenue field from the Sales before June 30 query. Select Design > Show/Hide > Totals to add the total row and change Group By under Revenue to Sum. Change the name of the summed revenue field to "Amounts Due." Go to Datasheet View and find the record for customer C900430, Cooper Fitness Center. What is the amount due from this customer? (Save this query as "Customer Sales before June 30.")