Answer:
c. $201,000.
Explanation:
The difference method works as follows:
We have a popuation of 1,000 accounts .
The sample items have a mean book of $200 and a mean audited value of $203
We have a difference of $3
This difference it's applied to the population of accounts and we get a value of $3,000 (1,000 accounts * $3)
As the book value in the population it's $198,000, we add the difference previously calculated of $3,000
So, we have $198,000 + $3,000 = $201,000