Flash is complaining about XML? Im using AS3 why are there XML errors? Unknown syntax errors.

Question

Sorry to keep spamming these forums with my stupid errors, but I am trying really hard to learn Flash/AS3 and when I have got to grips with it, I will return the love.
I am a flash rookie trying to make a simple calculation device and I am getting a whole world of errors I have never seen before.
My Code (I apologise but it may be my bad syntax):
import flash.ui.Mouse;
var Hnum:String;
var PCnum:String;
var calc:Number = 25;
var Total:Number;
num1.restrict = "0-9";
num2.restrict = "0-9";
Est_btn.addEventListener(MouseEvent.CLICK, calculate);
function PartCount(event:MouseEvent):void{
    PCnum = num2.text;
    if (PCnum > 0 && < 10){
        parseInt(PCnum) * 10;
    or if (PCnum > 11 && < 20){
        parseInt(PCnum) * 5;
    or if (PCnum > 21){
        parseInt(PCnum) * 1;
Est_btn.addEventListener(MouseEvent.CLICK, calculate);
function calculate(event:MouseEvent):void{
    Hnum = num1.text;
    PCnum = num2.text;
    Total = parseInt(Hnum) * calc + parseInt(PCnum);
    Total.toString();
    Total_txt.text = String(Total);
I had everything working when I was only calculating Hnum by 25. But when I try to intergrate  the if or statement everything goes wrong and I get these 5 errors.
Scene 1, Layer 'Actions', Frame 1, Line 15
1104: invalid xml name
Scene 1, Layer 'Actions', Frame 1
1084: Syntax error: expecting xmltagendend before end of program.
Scene 1, Layer 'Actions', Frame 1
1084: Syntax error: expecting rightparen before end of program.
Scene 1, Layer 'Actions', Frame 1
1084: Syntax error: expecting identifier before end of program.
Scene 1, Layer 'Actions', Frame 1
1084: Syntax error: expecting rightbrace before end of program.
I dont understand what these errors are pointing out? Why XML? is it my variable names?
Here is the code I had before the second function that worked fine:
var Hnum:String;
var PCnum:String;
var calc:Number = 25;
var Total:Number;
num1.restrict = "0-9";
num2.restrict = "0-9";
Est_btn.addEventListener(MouseEvent.CLICK, calculate);
function calculate(event:MouseEvent):void{
     Hnum = num1.text;
     PCnum = num2.text;
     Total = parseInt(Hnum) * calc;
     Total.toString();
     Total_txt.text = String(Total);
Any help would be greatly appreciated! I will get the hang of this!
MrB

Answer 1

Thanks guys you were right it was parse problem with the var type.
I have changed the code adding parseInt where necessary.
I have also added the other functions. But now after it was working fine with just the one function it is doing the strangest thing.
There are no errors, it is running fine but it is outputting the letter "a" instead of any numbers? Is this something to do with the strings? It is most odd.
Any help would be greatly appreciated.
Here is the new code:
import flash.ui.Mouse;
var Hnum:String;
var PCnum:String;
var PCcalc:Number;
var Pmath:Number;
var calc:Number = 25;
var Total:Number;
num1.restrict = "0-9";
num2.restrict = "0-9";
Est_btn.addEventListener(MouseEvent.CLICK, calculate);
function PartCount(event:MouseEvent):void{
    if (parseInt(PCnum) > 0 && parseInt(PCnum)< 10){
        PCcalc == 1;
    if (parseInt(PCnum) > 11 && parseInt(PCnum)< 20){
        PCcalc == 2;
    if (parseInt(PCnum) > 21 && parseInt(PCnum)<200){
        PCcalc == 3;
Est_btn.addEventListener(MouseEvent.CLICK, calculate);
function PartCalc(event:MouseEvent):void{
    if (PCcalc == 1){
        Pmath * 10;
    if (PCcalc == 2){
        Pmath * 5;
    if (PCcalc == 3){
        Pmath * 1;
Est_btn.addEventListener(MouseEvent.CLICK, calculate);
function calculate(event:MouseEvent):void{
    Hnum = num1.text;
    PCnum = num2.text;
    Total = parseInt(Hnum) * calc + Pmath;
    Total.toString();
    Total_txt.text = String(Total);
Thanks
MrB