Kevin is a college junior, majoring in computer science at Purdue University. He made an app, BigTen Winner, and he is selling it for $3 per copy. Kevin finds that 80% of users can successfully open his game after they install it, so he provides two solutions for those users who fail to open the game: 1) refund all the money, or 2) give one alternative game he developed and refund $2. 70% of the users will select the first option and 30% of the users will select the second option. The num- ber of monthly downloads is described as a normal distribution with a mean of 400 and a standard deviation of 50