Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: My niece gave me a textbook to sell. Sentence 2: It was to benefit her college. Sentence 3: I saw it was selling on Amazon for $90. Sentence 4: I posted it for $60 and sold it in a day. Sentence 5: My niece was very happy.

Textbook