Will a customer still be charged shipping when using an e-card? For example, the items total $18 and there is a $2.50 shipping charge, so the order total is $20.50. They have an e-card for $25. Will only the $18 go against the eCard and then they get charged $2.50 for shipping, or will the entire $20.50 go against the eCard and they pay no shipping?

Just to clarify, this purchase would be done and an online storefront. And I have all purchases at my online store set up with a $2.50 shipping charge.