So you them the answer you submit must be the d operators; they are pald $8.10 an hour each and work 40 hours a week and 52 weeks a year. the machines break down periodically, resulting in annual repair costs of $1,320 for each and supplies cost $960 a year for each machine. vill have a life of 5 years and a total disposal value at that time of $1, 500. the kodak system will require only 2 regular operators. supplies wil be $3,600 per year. kodak has offered the college a maintenance contract that covers all machine breakdowns; the cost of the contract is $1,020 per year. total cost for all favor keeping the canon copiers, enter your net present value difference as a positive number; if