Hi-Tech Inc. has several outdated computers that cost a total of $17,800 and could be sold as scrap for $4,600. They could be updated for an additional $2,400 and sold. If Hi-Tech updates the computers and sells them, net income will increase by $9,000.

What amount would be considered sunk costs?

Select one:a. $9,000b. $2,400c. $20,200d. $17,800