Answer:Please Refer to the explanations section
Step-by-step explanation:
Angelo may access the sales database and use the book's bar code or title of the book and the name of the Author to retrieve sales information on each book and check how a certain books is performing in terms of sales.
He must also access also access inventory (Books) database to cross reference the Number of Books sold with the total number books at the beginning and number of books on hand. the number of books on hand should equal to Total number of books at the beginning minus books sold.