In the table at the top of page 59, the three "Output destinations" should be: Replen. 1, Replen. 2, and Replen. 3.
For Exercise 20, the number of time units per simulation should be 480 (minutes).
There is a subtle difference between how the book says SimQuick handles resources and how they are actually handled. Suppose a number of Work Stations share a resource and one of them finishes working. The book claims that the resource next goes to the highest priority Work Station that is idle, has all its inputs, and is not blocked (hence, the Work Station that just finished can retain the resource). What actually happens is that the resource goes to the highest priority different Work Station that is idle, has all its inputs, and is not blocked. (This issue was pointed out by Robert Vinglas, who was a student of Parthasarati Dileepan at the University of Tennessee at Chattanooga.)
I have a different version of SimQuick that works as claimed in the book. If you are a SimQuick user and would like a copy, I'd be happy to send you one. Using the different version yields slightly different answers to exercises 10 and 22. The other exercises that use resources are unaffected. Of course, all models without resources are unaffected by this issue.