Definition: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Input: Sentence1: Charles dropped his car off at his mechanic's shop. Sentence2: His mechanic fixed his car and charged Charles a thousand dollars. Sentence3: Charles couldn't pay the bill and had to forfeit his car. Sentence4: Charles sued his mechanic because his prices were too high.

The court found out Charles' mechanic marked up prices on parts.