The 10,000 accounts receivable of DEF Company have a total book value of $120,000. A CPA has selected and audited a sample of 100 accounts with a total book value of $1,000 and an audited value of $1,200. Using the mean-per-unit estimation technique, the estimated total audited value of the population is:

$100,000.
$120,000.
$140,000.
$144,000.