title: Progress icons with sum in Excel
body: <p>I have a basic sheet with monthly stats. For the end of each month, there are totals.</p>
  <p>I want to clearly show if there was an increase or decrease next to the sum for each month. Ideally, with a green or red arrow next to the sum for each month.</p>
  <p>Is there a way to show an increase or decrease between my monthly total values?</p>
  <p>Thanks.</p>