Identify which control activity is violated in each of the following situations, and explain how the situation creates an opportunity for fraud or inappropriate accounting practices. 

1. Once a month, the sales department sends sales invoices to the accounting department to be recorded. 

2. Steve Nicoles orders merchandise for Binn Company; he also receives merchandise and authorizes payment for merchandise. 

3. Several clerks at Draper’s Groceries use the same cash register drawer.