O.k., this is the deal. You must use the MHS10 code first because it is a code for $10 off your first order. Then you can place a second order using the code tenoff to receive an additional $10 off. You will need to pay the 99 cent shipping cost on each order. Medco is a HUUUUUUGE medical supply/prescription drug mail order company. I know it sounds too good to be true but, I have no doubt all will be well. I did check with my credit card company and both of my charges went through. The first order I placed was for Pampers baby wipes, 2 packages for $4.99 each. My subtotal was $9.98 so, I paid 99 cents for shipping. My second order was for a Bed Buddy, priced at $12.49 plus 99 cents shipping. I paid $3.28 for that order and those were the charges placed against my credit card. As far as I can see, it is still working and I did get the prices I agreed to pay.