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For Wordpress/WooCommerce: in the case where the UPS Shipping Module is enabled concurrent with the standard Free Shipping Module set to kick in at a specified order amount (the trigger amount):
Customer is offered free shipping on UPS Ground only when total order amount is over the set trigger amount (specified in the existing Free Shipping settings in Admin), leaving the expedited UPS shipping options to appear to the customer as choices as well (as selected in the UPS Shipping module settings in Admin). So on the front end, for a total order amount over the trigger amount, the customer would see "Free Shipping" instead of UPS Ground (set to be the default shipping choice) and could opt for other expedited UPS choices if she wanted to.
The point is so that the customer can elect to pay for expedited shipping and not be restricted to free shipping only as is currently the default when Free Shipping is enabled.