i have the data in this format

name Jan Feb Wed
alan 5 10 15
ben 6 0 3


others 5 10 5
others 1 2 2

what i want is to do 3 suming..one is after the list of name i want it to do
a sum then after which is sum for others. finally do a sum for both name and
other. this is what it shld look like.

name jan feb march
alan 5 10 15
ben 6 0 3
sum 11 10 18

other 5 10 15
other 1 2 2
sum 6 12 17
total 17 22 35

is that a way to do this?