BigByte Company has 20 obsolete computers that are carried in inventory at a cost of $15,000. If these computers are upgraded at a cost of $8,000, they could be sold for $17,700. Alternatively, the computers could be sold "as is" for $8,500. What is the net advantage or disadvantage of reworking the computers?
$1,200 advantage
$1,200 disadvantage
$9,200 disadvantage
$9,700 advantage