Another Interesting Living Math Resource

I read about this series of Business Math on one of the Yahoo Groups I subscribed to.
This resource is available on the Simply Charlotte Mason website, as a printed text or as an e-book. Here is a description from the website:
"Your Business Math Series is a fun and “living math” kit that reinforces math skills for ages 8–12! Your student uses his math knowledge to keep his very own store running and, hopefully, make a profit. But there are also some surprises along the way!"
I thought this might be a great way to review math skills, it can be completed in a few weeks or a whole school year. The student can choose to "run" a pet store, a book store or a sports store. They cover many aspects of running a store...sales, inventory, paying bills, writing checks, keeping a bank account ledger, etc.