In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.
Q: Title: App. Sentence 1: Carl played a game on his cell phone. Sentence 2: The game app allowed him to buy coins and upgrades. Sentence 3: But then his mom saw that he had spend fifty dollars on the app! Sentence 4: She shut Carl's phone off for an entire month.
A:
Carl learned his lesson during that miserable month!