Taster Corporation has 690 obsolete personal computers that are carried in inventory at a total cost of $1, 053, 630. If these computers are upgraded at a total cost of $41, 400, they can be sold for a total of $707, 940. As an alternative, the computers can be sold in their present condition for $638, 595. The sunk cost in this situation is: $638, 595 $41, 400 $707, 940 $1, 053, 630