Velocity Racing School is a company that trains people to drive their sports cars on a track. They are under contract with Thunderhill Raceway to train drivers on that track. They are paid $500 per student, and at the end of the month, they receive an additional $100 per student if 80% or more of the students rate the instructors as excellent. They are paid on the 10^th of the following month. They make adjusting entries both mid and end of month. For the month of July, they worked with 100 students in the first 15 days, and by the way things were going, they felt that 40% of the students would rate them as excellent. During the latter half of the month, they worked with another 200 students, but by the end of the month, they felt that 90% of the month's students would rate them as excellent. When it was time to be paid on the 10^th of the following month, it turns out that 70% of the students had rated them as excellent. Velocity uses expected value for variable consideration. How much revenue did they book on the 15^th? On the 31^st? On the 10^th of the following month?