Show total commit count of two authors or more authors into first author

I usually count commits as below command

$ git shortlog -s -n
   149  Jagan Teki
   148  Otavio Salvador
   143  Bo Shen
   137  Lokesh Vutla
   134  Minkyu Kang
   132  Marian Balakowicz
   129  Haavard Skinnemoen
   127  Holger Brunck
   124  Tim Harvey
   122  Jagannadha Teki
   120  Daniel Schwierzeck
   119  Eric Nelson
   118  Andy Fleming
   116  Jagannadha Sutradharudu Teki

Out of which below three names are with same author which changed
while submitted patches.
  149  Jagan Teki
  122  Jagannadha Teki
  116  Jagannadha Sutradharudu Teki

I need a command to show to add all commits and show first one as
   387 Jagan Teki

Can anyone help to do this?

thanks!