Subscriber Letter of Authorization to Charge Credit Card

I authorize Collector's Paradise, Inc. to perpetually charge to the following described credit card the amount equal to the value of the product I have agreed to purchase in my subscription agreement, until I notify them to stop. The card will be charged only if I fail to pick up my subscription for 3 or more consecutive weeks. I agree that if I notify the store to stop my subscription, I give them permission to charge me for the balance of books in my hold box. The amount i shall be charged, whenever appropriate, as agreed, shall be equal the total retail value of the product minus the discount percentage given to me at sign up, plus any applicable sales taxes.