I've tried to change the code somewhat and it still displays the shipping options ive excluded. Any help would be appreciated!

I'm using the newest version of zen-cart and USPS module.

PHP Code:
global $cart;
$chk_products15 $_SESSION['cart']->in_cart_check('products_id','15');
$chk_products16 $_SESSION['cart']->in_cart_check('products_id','16');
$chk_products42 $_SESSION['cart']->in_cart_check('products_id','42');
$chk_products43 $_SESSION['cart']->in_cart_check('products_id','43');
$chk_products73 $_SESSION['cart']->in_cart_check('products_id','73');
$chk_products74 $_SESSION['cart']->in_cart_check('products_id','74');
$chk_products76 $_SESSION['cart']->in_cart_check('products_id','76');
$chk_products77 $_SESSION['cart']->in_cart_check('products_id','77');
$chk_products81 $_SESSION['cart']->in_cart_check('products_id','81');
$chk_products82 $_SESSION['cart']->in_cart_check('products_id','82');
$chk_products83 $_SESSION['cart']->in_cart_check('products_id','83');
$chk_products84 $_SESSION['cart']->in_cart_check('products_id','84');



$skip_type false;
if ( (
$type == 'First-Class Mail International Large Envelope' ||$type == 'First-Class Mail International Package' ||$type == 'Priority Mail International Flat Rate Envelope' ||$type == 'Priority Mail International Small Flat Rate Box' ||$type == 'Express Mail International Flat Rate Envelope' || $type == 'Priority Mail International Small Flat Rate Box') && ($chk_products15 +$chk_products16 $chk_products42 $chk_products43 $chk_products73 $chk_products74 $chk_products76 + + $chk_products77 $chk_products81 $chk_products82 $chk_products83 $chk_products84 +) > 0) {
  
$skip_type true;
}

if ( (
$type == 'Priority Mail International Medium Flat Rate Box' ) && ($chk_products42 $chk_products43 $chk_products74 $chk_products77 $chk_products83 $chk_products84 ) > 0) {
  
$skip_type true;

}

if (
$skip_type) {


  
// do not show excluded shipping types
} else {