A machine was sold in December 20x3 for $9,000. It was purchased in January 20x1 for $15,000, and depreciation of $12,000 was recorded from the date of purchase through the date of disposal. Assuming a 40% income tax rate, the after-tax cash inflow at the time of sale is:

Multiple Choice:

$7,800.

$11,400.

$8,400.

$3,600.

$9,000.