Katie and Amy went shoe shopping this week. They each found a cool pair of shoes to buy. The shoe store was having a special sale: buy 1 pair and get the 2nd pair at 1/2 price. Katie's pair of shoes cost $50 and Amy's cost $35. If Katie and Amy buy their shoes together in order to get the discount, how much should each person pay? What is fair? Explain your answer and explain why you chose the answer that you did.