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

a) $6,600.

b) $800.

c) $1,600.

d) $3,300.