Rocky Guide Service provides guided 1–5 day hiking tours throughout the Rocky Mountains. Wilderness Tours hires Rocky to lead various tours that Wilderness sells. Rocky receives $1,800 per tour day, and shortly after the end of each month Rocky learns whether it will receive a $180 bonus per tour day it guided during the previous month if its service during that month received an average evaluation of "excellent" by Wilderness customers. The $1,800 per day and any bonus due are paid in one lump payment shortly after the end of each month. On July 1, based on prior experience, Rocky estimated that there is a 30% chance it will earn the bonus for July tours. It guided a total of 10 days from July 1–July 15. On July 16, based on Rocky’s view that it had provided excellent service during the first part of the month, Rocky revised its estimate to an 80% chance it would earn the bonus for July tours. Rocky also guided customers for 15 days from July 16–July 31. On August 5 Rocky lear