title: Count number within slabs through excels function / formula
body: <p>I want to count the amount between different value slabs. For Example</p>
  
  <pre><code>**Customer      Amount** 
  A               100
  B               300
  A               500
  C               700
  D               900
  E               1100
  F               1300
  G               1500
  H               1700
  I               1900
  </code></pre>
  
  <p>Desired result</p>
  
  <pre><code>**Solutions          Count**
  Between 100-500         2
  Between 500-1000        3
  Between 1000-1500       3
  Between 1500-2000       2
  </code></pre>
  
  <p>i tried it trough countif formula but it include a lot of efforts when there is huge data and lots of amount slabs are included</p>