Q: 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.
Title: The New Bathroom Sink. Sentence 1: My girlfriend did not like the look of her old bathroom sink. Sentence 2: Looking for a better sink, she spent a couple of hours at the store. Sentence 3: It cost her a hundred dollars to get the new sink installed. Sentence 4: She found a modern sink with a single faucet that she really liked. Sentence 5: Now she would like to upgrade the rest of the bathroom to match it!
A:
34