Pedo Romp/Approach the two preppy girls
You step up to the check out line, and beckon the cashier. It's an older lady, mid forties most likely, but that's not what you're here for.
"Mam," you ask the cashier, "why are you holding up the line for these two girls?" The cashier pauses a moment to assess you. Finally she seems to set herself that the two girls must know you. "They don't have enough money for what they want to buy," she tells you. "They've been sitting here trying to stack coupons to make it affordable."
"Is this true?" You ask the girls. The taller of the two girls eyes you down for a second, then she nods slightly.
"The catalog said the thing would only cost $59.99," The shorter of the two spoke up. "So we only brought $65."
You turn back to the cashier, "How much is the total?" You ask. The cashier turns to her monitor for a second, pushes a button, and says, "Right now, it's still $112.48." You let out a low whistle. Is $112 worth whatever these two will do to thank you?