Old links

 Final spreadsheet -

https://docs.google.com/spreadsheets/d/1bNKTVyXhx97BmLq2yWsKPHpD8bmp4LjgWYzup9YHi28/edit

POY Points Calculating widget - 

<script type="text/javascript">

 function calcLeaguePoints() {

  var participantCount = document.leaguePoints.participantCount.value * 1;

  var buyInCost = document.leaguePoints.buyInCost.value * 1;

  var totalExpense = document.leaguePoints.totalExpense.value * 1;

  var finish = document.leaguePoints.finish.value * 1;

  answer = (Math.sqrt(participantCount * buyInCost * buyInCost / totalExpense) / (finish + 1)).toFixed(2);

  if(isNaN(answer)){answer="";}

  document.leaguePoints.answer.value = answer;

  return true;

 }

</script>

<form name="leaguePoints">

<table class="pointsform">

 <tr>

  <td class="left-field">Participants:</td>

  <td><input type="text" name="participantCount" size="5" maxlength="5"/></td>

 </tr>

 <tr>

  <td class="left-field">Buy-in cost:</td>

  <td><input type="text" name="buyInCost" size="5" maxlength="5"/></td>

 </tr>

 <tr>

  <td class="left-field">Your total expense:</td>   

  <td><input type="text" name="totalExpense" size="5" maxlength="5"/></td>

 </tr>

 <tr>

  <td class="left-field">Your finish:</td>   

  <td><input type="text" name="finish" size="5" maxlength="5"/></td>

 </tr>

 <tr>

  <td style="text-align:center;" colspan="2">

  <input type="button" style="text-align:center;font-size:0.5em;" value="Calculate League Points" onclick="calcLeaguePoints()"/></td>

 </tr>

 <tr>

  <td class="left-field">League points:</td>

  <td><input type="text" name="answer" size="5"/></td>

 </tr>

</table>

</form>