My mind starting asking the following question: "Increase in reference to what? A sale?" I then went on to say for a sale Jones would make $6000, and for a lease, Jones would make $9070 for the year (6000+3070). Therefore the Net Income would CHANGE (comparing the sales vs the lease) $3070. Because the answer didn't exist, I chose $9070, but I believe this question should be re-worded.