In a PPS sample with a sampling interval of \(\$ 5,000\), an auditor discovered that a selected account receivable with a recorded amount of \(\$ 9,000\) had an audit amount of \(\$ 8,000\). If this were the only error discovered by the auditor, the projected error of this sample would be

a. \(\$ 1,000\).

b. \(\$ 2,000\).

c. \(\$ 4,000\).

d. \(\$ 5,000\).