Each plan shows 6 fall/spring semesters and 4 summer sessions. Each summer session tuition is about half of a fall/spring semester tuition. So these plans show the equivalent of 8 semesters of tuition, and probably approximately 8 semesters of living and other expenses (depending on if summer session living and other expenses are more or less than have of a fall/spring semester living and other expenses).
So $45k * 6 + $22.5k * 4 or $360k would be a reasonable estimate of the total list price while the student is in school (for the 6 fall/spring semesters and 4 summer sessions). The student would not be paying these amounts while working on co-op (although the student at a co-op job may have to use some of their earnings to pay for living expenses at the co-op location).