Auditing and Assurance Services 1st Edition by Iris Stuart

Exercise 46

Copies of sales invoices show different unit prices for apparently identical items. What control should have prevented the misstatement a. All sales invoices are checked as to all details after their preparation.
B) Differences reported by customers are satisfactorily investigated.
C) Statistical sales data are compiled and reconciled with recorded sales.
D) All sales invoices are compared with the customer's purchase orders.