Accumulated column

Hi! 

People, I need to do a column accumulating values. But I have a problem. I have this structure:

On the image: 

COLUMN 1 - RANK (FAILLING)

COLUMN 2 - PRODUCT CODE

COLUMN 3 - VALUE I WANT TO ACCUMULATE

COLUMN 4 - (IT'S THE ABC CURVE CLASS. I NEED THE ACCUMULATED COLUMN TO GET IT RIGHT)

COLUMN 5 - ACCUMULATED

My rank isnot working as well. Because my codes can have equals values. Then, when I go to accumulate, the SUM stop on values until it's not repeating.