how to calculate sum of two fields using eval command?

[Madhan45]

I have column A and B, its values are

A- 5,10,15,20
B-1,2,3,4

i need the Total in third field which should contain their addition like below:
Total-6,12,18,24.

how can i use eval command for that.??

[richgalloway]

Are A and B multi-value fields?

[woodcock]

Like this:

... | eval Total = A + B

[Madhan45]

for sub,mul,div "A-B", "A*B","A/B" is it so?

[woodcock]

Exactly, provided that both A and B are single-valued files; is either multi-valued?. Don't forget to click "Accept".