title: How to add array values using NSMutableArray in iPHone?
body: <p>I have the data into the mutable array and the value of array is, </p>
  
  <pre><code>     { "20", "40", "50","60", "70"}.
  </code></pre>
  
  <p>I have stored the string values into the array.</p>
  
  <p>Now i want to total value of the array. Result is : 240</p>
  
  <p>Thanks!</p>