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Buchanan Company has 15,000 obsolete model cell phones that are carried in irventory at a cost of $1,800,000. If these cell phones are upgraded at a total cost of $630,000, they can be sold for a total of $750,000. Aternatively, Buchanan can sell the cell phones in their present condition for $160,000. The sunk cost in this situation is $2,430,000 $160,000 5750,000 $1.800,000 5630,000