function totalCost(){

	
	var quanity = document.getElementById('quanity').value;
        var price = document.getElementById('productPrice').value;
        var shipping = document.getElementById('productShipping').value;
        
        
        totalPrice = (Number(price)*Number(quanity)) + Number(shipping);
        
        // Display Prices

		document.getElementById('paymentAmount').value = totalPrice.toFixed(2);
        document.getElementById('displayTotal').innerHTML = '$' + totalPrice.toFixed(2);

        
        
        
}