Trade dares for pennies

"I'll do dares!" I blurt out

I don't know what possessed me to think of this, but I did. Common sense and my terrible luck tonight tell me this is a horrible idea, but then again if I listened to common sense I would have quit after I ended up in my underwear.

"Uh... what?" my sister asks, unsure if she heard me right.

"How about you give me a dare, that I swear I'll do, in exchange for a half roll?" I ask.

Ashley thinks for a second, smiles, and says "Deal."

"Alrighty then, what do you got for me?" I ask confidently, still unaware of just how crazy this could get.

Ashley stands up and says "Okay, in exchange for one half of a roll of pennies, you must...