lst1 = ['company1,AAA,7381.0 ', 'company1,BBB,-8333.0 ', 'company1,CCC,
3079.999 ', 'company1,DDD,5699.0 ', 'company1,EEE,1640.0 ',
       'company1,FFF,-600.0 ', 'company1,GGG,3822.0 ', 'company1,HHH,-600.0 ',
       'company1,JJJ,-4631.0 ', 'company1,KKK,-400.0 ']

lst2 =['company1,AAA,-4805.0 ', 'company1,ZZZ,-2576.0 ', 'company1,BBB,1674.0 ', 'company1,CCC,3600.0 ', 'company1,DDD,1743.998 ']

output I need ==

['company1,AAA,2576.0','company1,ZZZ,-2576.0 ','company1,KKK,-400.0 ' etc etc]

I need to add it similar product number in each list and move it to a new list. I also need any symbol not being added together to be added to that new list. I am having problems with moving through each list.

This is what I have:

h = [] 

z = []         

a = []        

for g in hhl:
    spl1 = g.split(",")
    h.append(spl1[1])
for j in c_hhl:
    spl2 = j.split(",")
    **if spl2[1] in h:
        converted_num =(float(spl2[2]) +float(spl1[2]))
        pos=('{0},{1},{2}'.format(spl2[0],spl2[1],converted_num))
        z.append(pos)**
    else:
        pos=('{0},{1},{2}'.format(spl2[0],spl2[1],spl2[2]))
        z.append(pos)

for f in z:
    spl3 = f.split(",")
    a.append(spl3[1])

for n in hhl[:]:
    spl4 = n.split(",")
    if spl4[1] in a:
        got = (spl4[0],spl4[1],spl4[2])
        hhl.remove(n)
smash = hhl+z #for i in smash:
for i in smash:
    print(i)

I am having problem iterating through the list to make sure I get all of the simliar product to a new list,(bold) and any product not in list 1 but in lst2 to the new list and vice versa. I am sure there is a much easier way.