Given the task definition and input, reply with output. 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: Price Adjustment. Sentence 1: Irritated, Mary called the online retailer to complain. Sentence 2: Several days later, she noticed the price of the shoes had dropped. Sentence 3: Mary ordered a pair of shoes online. Sentence 4: The polite customer service rep refunded the price difference. Sentence 5: Mary now makes it a point to use this site whenever she needs shoes.
31