Hi,
Please note the language listed on this page:
http://www.manhattangmat.com/storeitems ... 81&catid=4The Computer Adaptive Tests are "included with the purchase of any of our Strategy Guides or Prep Courses. If you later decide to purchase Strategy Guides of equal or greater value, or upgrade to a Prep Course, we will apply a credit for the retail value of your 1 Year Practice Exam Access."
Since a single strategy guide is not of equal or greater value, we would not be able to credit you the remaining amount. Also, in order for these credits to go through, you would have to purchase them directly from us, and not an outside retailer, as we would have to adjust the amount manually.
For more information, feel free to email
studentservices@manhattangmat.com .
Best Wishes,
Caitlin Clay
Student Services Associate
Manhattan GMAT