Getting an error " variable may not have been initialized'

Hey guys, I know what the error means but I don't think initializing the variable will make my code work as intended so I'm having a little dilemna here... here's the code and I'll highlight the part that is said to be not initialized:

Java Code:

import java.util.Scanner;

   public class ItemCost {
    public static void main (String []args){
    int i=1,item=1,e=1, f=1, g=1;
    int items,  d ;
    double gst, qst, subt, Tot = 1, PriceItems ;
    Scanner x = new Scanner(System.in);
    Scanner y = new Scanner(System.in);
    Scanner z = new Scanner(System.in);
    Scanner w = new Scanner(System.in);


    System.out.println("Please input the amount of items bought");
    items = x.nextInt();

    while ( items < 1 || items > 10) 

    {
        System.out.print("Sorry the input was not correct, please try again\n");
        items = x.nextInt();
        i++;
    } 

  do 
  {
     System.out.print("Please input the price of the item  "+item   +         " " );
      PriceItems = y.nextDouble();
    [B][SIZE=4]  subt += PriceItems;[/SIZE][/B]
       if 
       ( PriceItems < 1 || PriceItems > 1000 )
           e++;
       else
      item++;
  }while (item <= items);



   System.out.println("Please input the rate of GST in %");
   gst = z.nextDouble();

   while (gst < 0 || gst > 22)
   { 
       System.out.print("Sorry, this was incorrect, please try     again");
       gst = z.nextDouble();
       f++;
   } 



   System.out.println("Please input the rate of QST in %");
   qst = w.nextDouble();

   while (qst < 0 || qst > 18)
   { 
       System.out.print("Sorry, this was incorrect, please try again");
       qst = z.nextDouble();
       g++;
   }
}
  }

So I'm supposed to get the following output :

Java Code:

 Please input the amount of items bought
2
Please input the price of the item  1 1
Please input the price of the item  2 2
Please input the rate of GST in % 20

Please input the rate of QST in % 18

HOWEVER my program doesn't seem to add input of item 1, and 2 if I initialize subt= 0 initially. It'll only take the last value inputted in the loop. By the way, the increments are counters to count the amount of errors the user might input by accident ( or whatever). Some people have been pointing it out as useless but that's the only way I found it to work.

THanks for the help in advance guys!