$shipping = 0 ;

foreach cart_item {

if ($customer_zone == "US" || $customer_zone == "CA"){
	if ($products_id == 44)
	   $shipping += 40.00 ;
	
	if ($products_id == 45)
	   $shipping += 45.00 ; 
}
else {
	if ($customer_zone == "ITALY"){
		if ($products_id == 44)
		   $shipping += 15.00 ;
		
		if ($products_id == 45)
		   $shipping += 16.00 ; 
	}
	else { // all the other world
		if ($products_id == 44)
		   $shipping += 80.00 ;
		
		if ($products_id == 45)
		   $shipping += 95.00 ;
	}
}

}