13) JW Enterprises is considering a new marketing campaign that will require the addition of a new computer programmer and new software. The programmer will occupy an office in JWs current building and will be paid $8,000 per month. The software license costs $1,000 per month. The rent for the building is $4,000 per month. JWs computer system is always on, so running the new software will not change the current monthly electric bill of $900. The incremental expenses for the new marketing campaign are: a. $8,000 per month. a. $o,uuu per monin. b. $13,000 per month. c. $13,900 per month. d. $9,000 per month