Tawstir Corporation has 500 obsolete personal computers that are carried in inventory at a total cost of $720,000. If these computers are upgraded at a total cost of $210,000, they can be sold for a total of $270,000. As an alternative, the computers can be sold in their present condition for $50,000. What is the net advantage or disadvantage to the company from upgrading the computers rather than selling them in their present condition? $770,000 disadvantage $10,000 advantage $220,000 advantage $60,000 advantage