title: select data from a table with a dropdown
body: <p>I have a very big table where I add a column every month with new prices. Then, I have to perform some analysis with those values. I have already made it but with the name of the column in the formula. I want to know if I can point the formula to the drop-down so I just select the new period when it is available and get the results.</p>
  
  <p>Here are some examples of the formulas I have been using:</p>
  
  <p><code>{=SUM(IF($B17=Matriz[money];Matriz[31-10-2013]*Matriz[country];0))}</code></p>
  
  <p>I would like to use something like </p>
  
  <p><code>{=SUM(IF($B17=Matriz[money];Matriz[*dropdow reference*]*Matriz[country];0))}</code></p>
  
  <p>pd: the <code>{ }</code> are for matrix calculations (when you use ctrl + shift + enter)</p>