How to sum value in list using some key?

I have just begun studying Python. I want sum some list data in Python.

convert.txt.

/vol/vol0/,1GB,1GB,1GB,7%,FAS8040-ZZZZ
/vol/vol0/,466GB,31GB,435GB,7%,FAS8040-ZZZZ
/vol/vol0/,1GB,1GB,1GB,8%,FAS8040-CCCC
/vol/vol0/,466GB,38GB,428GB,8%,FAS8040-CCCC
/vol/vol0/,200GB,200GB,200GB,7%,FAS8040-XXXX
/vol/vol0/,100GB,100GB,100GB,7%,FAS8040-YYYY

Script

with open("convert.txt", "r") as f:
    for line in f:
            line = line.split(',')
            vser = line[5].replace('\n','')
            tcap = int(line[1].replace('GB',''))
            ucap = int(line[2].replace('GB',''))
            acap = int(line[3].replace('GB',''))
            data = vser, tcap, ucap, acap
            print (data)

I want to sum like a dictionary.

But I need below output.

FAS8040-ZZZZ,467,32,436
FAS8040-CCCC,467,39,429
FAS8040-XXXX,200.200.200
FAS8040-YYYY,100,100,100