Which of the following is used by both internal and external users?

Retail sales include the sales of durable and nondurable goods bought by ____.

Fill in the blank(s) with the appropriate word(s).

Amir takes his car to City Car Repairs to get his brakes repaired. City gives an estimate of $1,000 for the repair in writing and Amir agrees. When Amir comes to get the car after the brakes are fixed, he was given a bill for $1,200

As a result Amir A) must pay the $1,200 B) only has to pay $1,000 C) must pay $1,100 D) does not have to pay anything E) will have to take the case to ADR