Jason, sorry for the confusion ... I have already produce two operating discounts, working independently of each other. My question of the thread was how to allow then to run together, if applicable (whenever I entered a second promo code, the first was over written). With your custom expression, my only questions were if it replaced, or accompanied, the existing triggers in my rule (which you have demonstrated as accompanying), and what the operator would be (AND) ... you have given me my answers :)
Thanks as always ... you guys do a great job!