CAN I BOOST MY GPA?***

I really want to graduate with honors this year and to do that you need a 3.5 GPA and as of right now my GPA is set at 3.0 and I am planning on taking online summer courses to boost my GPA up but my counselor told me that each class would only boost it by .4 points making it a 3.16 (three classes*). The total cost will be $1.400, it this even worth it? I am planning on making all A’s this year, senior year. ANY ADVICE WILL BE ACCEPTED! THANK YOU!!!