update complete tab and other issuse

app/pdf/receipt_bill_pdf.rb

@@ -196,6 +196,7 @@ class ReceiptBillPdf < Prawn::Document
         y_position = cursor
         move_down line_move
         sub_total = 0.0
+        total_qty = 0
         sale_items.each do |item|
             # check for item not to show 
           if item.price != 0
@@ -204,7 +205,7 @@ class ReceiptBillPdf < Prawn::Document
                 total_price   = item.price #item.qty*item.unit_price - comment for room charges
                 price         = item.unit_price
                 product_name  = item.product_name
-
+                total_qty    += item.qty
 
                 y_position = cursor
 
@@ -238,6 +239,7 @@ class ReceiptBillPdf < Prawn::Document
         bounding_box([0,y_position], :width =>self.item_description_width, :height => self.item_height) do
             text "Sub Total", :size => self.item_font_size,:align => :left
         end
+        text_box "#{number_with_precision(total_qty, :precision => precision.to_i)}", :at =>[item_qty_front_width,y_position], :width => item_qty_end_width,  :size => self.item_font_size, :align => :center, :overflow => :shrink_to_fix
         bounding_box([self.item_description_width,y_position], :width =>self.label_width) do
             text "#{number_with_precision(sub_total, :precision => precision.to_i, :delimiter => delimiter)}" ,:delimiter => ',', :size => self.item_font_size,:align => :right
          end