Rose Wilson is entering her senior year as an accounting major and has a number of options for her summer break. Her options for the 3 month break follow: (1) Work full time at a local accounting firm making $2,200 per month. (2) Take a summer class which will cost $800 and work half time making $1,100 per month. (3) Take a class at a cost of $800 and not work at all during the summer. Rose's incremental revenue if she chooses option 1 over option 2 would be?