So this one actually turned out exactly how I envisioned it. First the rules and then my layout.
Journaling: Sonic uses the slogan of "Your Ultimate Drink Stop" due to the 168,894 possible drink combinations. However, as you can see from my Facebook post from yesterday, the one flavor combination they don't offer is a Strawberry Lime Slush. When I ordered my Lemon-Berry Slush, the lady was fine with that - it's on the menu, but when I wanted a Strawberry Lime slush, the lady said, "We don't have that." Of all the flavor combinations out there, that's the one the lady had the issue with. We did get the slush, but it was a bear getting her to believe that they had all the ingredients to make a Lime-Berry slush.