title: Grouping and summing two columns using awk
body: <p>How do I get Region-wise totals of Sales and Cost from the data below? </p>
  
  <pre><code>Region Sales Cost
  North 139 35
  South 786 295
  South 312 117
  East 288 108
  North 149 56
  West 508 127
  North 145 54
  South 379 142
  East 500 188
  </code></pre>
  
  <p>eg.</p>
  
  <pre>
  North 433 145
  and so on 
  </pre>