Help with jQuery Calculation plugin

Question

I am trying to use the jquery plugin to help out with a simple equation. I am working on it here:

http://www.zacharydesigns.com/sandbox/calc2.html

Right now I am trying to figure out how to get the second column, package pricing to be generated from this equation:

product price / total product price * 399.99

Here is the bit I was trying to use to generate that:

 // the values are changes via the keyup event
      $("input[name^=prod]").sum("keyup", "#totalSum");
      $("input[name^=upgradeSum]").sum("keyup", "#totalUpgradeSum");

// the part that I cant get to work

      $("input[name^=packagePricing]").calc(

     // the equation to use for the calculation
          "prod / totalSum * 399.99",

    {
       prod: $("input[@id^=prod_]"),
        totalSum: ("input[@id^=totalSum]"), 
        }, 

  // this function is execute after the calculation is completed, which allows us to
  // add formatting to our value
        function (s){
            // return the number as a dollar amount
            return "$" + s.toFixed(2);
        },
        // once all calculations are completed, we execute the code below
        function ($this){
            // now we get the sum() of all the values we just calculated
            var sum = $this.sum();

            // now that we have the grand total, we must update the screen
            $("#packagePricing").text(
                // round the results to 2 digits
                "$" + sum.toFixed(2)
            );
        }
    );

Thanks in advance for any help with this before my brain implodes.

Answer 1

Try setting the .calc function to the val() of the input, like so:

$("input[name^=packagePricing]").val(.calc(
     ....
));