Have a link to my file on gdocs
https://drive.google.com/file/d/0B-aNVtPlmLmvR0N6NXJWcERJUlE/view?usp=sharing
You can see that I have used filters(Detailtab), Sum(9,E:E) formula (detail tab) and SumIF formula(Summary tab). I have now been asked to exclude any negative remaining when I total...