In this task, you're given the title of a story consisting of five sentences, numbered 1 through 5. Your job is to determine which two sentences need to be swapped sentences in order to make a story that makes complete sense and is befittingly titled. Indicate your answer using the numbers of the two sentences in order, such as '34' or '25'. The first digit refers to the sentence which should come first in the story.

Let me give you an example: Title: Marcus Buys Khakis. Sentence 1: Marcus needed clothing for a business casual event. Sentence 2: The pair he bought fit him perfectly. Sentence 3: He decided to buy a pair of khakis. Sentence 4: All of his clothes were either too formal or too casual. Sentence 5: Marcus was happy to have the right clothes for the event.
The answer to this example can be: 24
Here is why: Marcus's reasons for buying khakis is established, followed by his purchase of them and reaction.

OK. solve this:
Title: The Calculator. Sentence 1: Amy was bad at math. Sentence 2: She needed to use a calculator for everything she did. Sentence 3: Amy knew the calculator had helped her a lot. Sentence 4: She got an A+! Sentence 5: She bought a fancy calculator and used it on her math test.
Answer:
35