add postprice in checkout.phtml

app/views/checkout.phtml

@@ -1,7 +1,14 @@
+<?if ($price_id['weight'] > 499){
+    $postprice = 450;
+}    
+else {
+    $postprice = 300;
+}?>
 
 <script>
     
     var product_price = <?=$price_id['offline_price']?>;
+    var postprice = <?=$postprice?>;
     
     function itog(){
 
@@ -18,7 +25,7 @@
             itog = itog + 300;
         }
         else if (document.getElementById('devilery_id3').checked){
-            itog = product_price + 300;
+            itog = product_price + postprice;
             itog = itog * count;
         }
 
@@ -99,7 +106,9 @@
                      $checked = ($ditem['delivery_id'] == $delivery_id) ? ' checked': '';?>
                     <p><input name="delivery_id" type="radio" id="devilery_id<?=$dd?>" onclick="devilery_check();" value="<?=$ditem['delivery_id']?>"<?=$checked?>>
                         <?=$ditem['delivery']?>
-                        <?if ($ditem['delivery_price'] > 0):?>
+                        <?if ($ditem['delivery_id'] == 4):?>
+                            + <?= $postprice?> руб.
+                        <?elseif ($ditem['delivery_price'] > 0):?>
                             + <?=$ditem['delivery_price']?> руб.
                         <?endif?>
                     </p>