How do you calculate a sum from two different fields and set as embedded data in Qualtrics?

Hey,
I have a question in which its rows will display based on whether a the sum total of the responses from two other questions adds up to less than 10 billion. Due to the fact that I have a complex Table of Contents, it will not allow be to add an embedded data field just before the block of this last question, which leads me to believe I need to use JavaScript in order to do this.
I have tried the following, but it doesn't work, as it doesn't update the embedded data field to the calculation.
Any help would be greatly appreciated - I have zero JavaScript knowledge!
Thanks,
Luke
Qualtrics.SurveyEngine.addOnload(function()
{
//Set new Active Module, hide buttons on empty page and automatically go to next page.
//This is because the embedded data works after the ToC creation, so needs a loading question to update it.
//REQUIRES a page break after this question.

//GATHER ALL VALUES INTO ONE PLACE
answerArrayOO4 = ["${q://QID4/ChoiceNumericEntryValue/1}"];
answerArrayOO5LEInt = ["${q://QID29/ChoiceNumericEntryValue/1/1}"];
answerArrayOO5LEExt = ["${q://QID29/ChoiceNumericEntryValue/28/1}"];
answerArrayOO5FIInt = ["${q://QID29/ChoiceNumericEntryValue/29/1}"];
answerArrayOO5FIExt = ["${q://QID29/ChoiceNumericEntryValue/30/1}"];
answerArrayOO5PEInt = ["${q://QID29/ChoiceNumericEntryValue/31/1}"];
answerArrayOO5PEExt = ["${q://QID29/ChoiceNumericEntryValue/32/1}"];
answerArrayOO5REInt = ["${q://QID29/ChoiceNumericEntryValue/33/1}"];
answerArrayOO5REExt = ["${q://QID29/ChoiceNumericEntryValue/34/1}"];
answerArrayOO5INFInt = ["${q://QID29/ChoiceNumericEntryValue/35/1}"];
answerArrayOO5INFExt = ["${q://QID29/ChoiceNumericEntryValue/36/1}"];
answerArrayOO5HFInt = ["${q://QID29/ChoiceNumericEntryValue/37/1}"];
answerArrayOO5HFExt = ["${q://QID29/ChoiceNumericEntryValue/38/1}"];

//CREATE VARIABLES
var i = 1;
  var x = answerArrayOO4[i-1];
var yLEInt = answerArrayOO5LEInt[i-1];
var yLEext = answerArrayOO5LEInt[i-1];
var yFIint = answerArrayOO5LEInt[i-1];
var yFIext = answerArrayOO5LEInt[i-1];
var yPEint = answerArrayOO5LEInt[i-1];
var yPEext = answerArrayOO5LEInt[i-1];
var yREint = answerArrayOO5LEInt[i-1];
var yREext = answerArrayOO5LEInt[i-1];
var yINFint = answerArrayOO5LEInt[i-1];
var yINFext = answerArrayOO5LEInt[i-1];
var yHFint = answerArrayOO5LEInt[i-1];
var yHFext = answerArrayOO5LEInt[i-1];

//SUM TOGETHER
var sumLEint = [(x/100)*yLEint];
var sumLEext = [(x/100)*yLEext];
var sumFIint = [(x/100)*yFIint];
var sumFIext = [(x/100)*yFIext];
var sumPEint = [(x/100)*yPEint];
var sumPEext = [(x/100)*yPEext];
var sumREint = [(x/100)*yREint];
var sumREext = [(x/100)*yREext];
var sumINFint = [(x/100)*yINFint];
var sumINFext = [(x/100)*yINFext];
var sumHFint = [(x/100)*yHFint];
var sumHFext = [(x/100)*yHFext];

//LE
Qualtrics.SurveyEngine.setEmbeddedData("Int_LE_USD", sumLEint);
Qualtrics.SurveyEngine.setEmbeddedData("Ext_LE_USD", sumLEext);
//FI
Qualtrics.SurveyEngine.setEmbeddedData("Int_FI_USD", sumFIint);
Qualtrics.SurveyEngine.setEmbeddedData("Ext_FI_USD", sumFIext);
//PE
Qualtrics.SurveyEngine.setEmbeddedData("Int_PE_USD", sumPEint);
Qualtrics.SurveyEngine.setEmbeddedData("Ext_PE_USD", sumPEext);
//RE
Qualtrics.SurveyEngine.setEmbeddedData("Int_RE_USD", sumREint);
Qualtrics.SurveyEngine.setEmbeddedData("Ext_RE_USD", sumREext);
//INF
Qualtrics.SurveyEngine.setEmbeddedData("Int_INF_USD", sumINFint);
Qualtrics.SurveyEngine.setEmbeddedData("Ext_INF_USD", sumINFext);
//HF
Qualtrics.SurveyEngine.setEmbeddedData("Int_HF_USD", sumHFint);
Qualtrics.SurveyEngine.setEmbeddedData("Ext_HFI_USD", sumHFext);

jQuery("#PreviousButton, #NextButton").css("visibility","hidden");
this.clickNextButton()

});

Qualtrics.SurveyEngine.addOnReady(function()
{
/*Place your JavaScript here to run when the page is fully displayed*/

});

Qualtrics.SurveyEngine.addOnUnload(function()
{
/*Place your JavaScript here to run when the page is unloaded*/

});