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 to not connect with the rest of the story. Ensure that the generated sentence is contextually relevant to the story.
One example: Title: Marcus Buys Khakis. Sentence 1: Marcus needed clothing for a business casual event. Sentence 2: All of his clothes were either too formal or too casual. Sentence 3: He decided to buy a pair of khakis. Sentence 4: The pair he bought fit him perfectly.
Solution is here: He left in a huff for having his ideas mocked.
Explanation: Marcus is buying clothes for a business event and not presenting an idea.

Now, solve this: Title: Costly school supplies.. Sentence 1: Olga was dreading school starting for her daughters. Sentence 2: They had long school supply lists that might cost a lot. Sentence 3: Olga waited till the last day to go shopping. Sentence 4: She found most of what she needed on sale.
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The next day he told Mike that the duck had died.