Pricing Rule Problem

I'm trying to create a couple of pricing rules that fire based on quantity items purchased.

The Rules I've created are below in order of how I have them listed in the Rule Set:

Rule #1 -Switch to 3 week price type if purchasing 3 or more weeks of classes (any mix of classes - could be 3 weeks of one class, 2 weeks of one class and 1 week of another, or 1 week of 3 classes)

Rule #2 - Switch to 2 week price type if you purchase 2 weeks of classes (again, any mix of classes qualifies - could be 2 weeks of one class or 1 week of 2 different classes)

I tried using seat volume rules as suggested by the Pricing Rules Recipe Book, but they're not working. I think the problem is that the patron can cart 2 seats of one class (firing the 2 seat discount rule) or 1 seat in each of two classes (again firing the 2 seat discount rule) before they ever get to the third week/class. My understanding is that SLIs stopped being evaluated once they've triggered a rule.

Have you solved this problem? If yes, can you please share your genius with me? Thank you in advance!

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