The Barter Stone: Maybe the Stone Can Help

"My cell phone isn't just missing, it's *gone*. My mom acts like I never had it," Karyn said. "This is getting strange." "Yeah, it is," Jon agreed. "But maybe the stone can help us out." "Good idea," Karyn said. And clutching the stone, she then said "I wish I knew why my cell phone and Jon's house addition disappeared." The stone glowed, granting her wish. But what was the price of it?