Clearing UPS Shipping Calculation when leaving checkout pages

I am trying to clear the shipping calculation after a customer decides to go back to my website to add or remove products from the shopping cart. I do not think it is the best user experience for my customers see the previously calculated UPS shipping charge in the shopping cart.

Is it possible to set a session variable or cookie that would ONLY remove the shipping data if a customer decides to go back and adjust his order? As of right now, the only way a customer can clear the shipping data of the previous UPS calculation is to click the "clear cart" button.

Any suggestions on how to do this will be greatly appreciated.

Yes.

You can add this code to the page where you want your UPS shipping cost cleared:

<?php
if(isset($_SESSION["WA_Store_Cart_UPS_Quote"])) {
unset($_SESSION["WA_Store_Cart_UPS_Quote"]);
}
?>

Thank you for posting the code. However, after placing the code on the shopping cart page the shipping is still there. Is there any particular place the code needs to be placed? Also, are there any possible triggers that need to be added for the code to work properly?

Please try this code again:

<?php
if (!session_id()) session_start();
if(isset($_SESSION["WA_Store_Cart_UPS_Quote"])) {
unset($_SESSION["WA_Store_Cart_UPS_Quote"]);
}
?>

I have added the session start to the top.

You will need to add this code to the top of your confirm page, since that where the shipping cost is being calculated.

Thank you for your continued help. I have one more issue: how do I equally remove the sales tax variable as well?

The tax does not get stored in a session a variable and should get calculated every time based on the products in your cart.

Are you experiencing similar issues with tax as of the shipping rule?