Managerial Accounting help??? Need MAJOR help

I need help with some accounting problems and since this doesn't work to paste my question properly and doesn't have a possibility to paste a picture...I need someone who can help me out with my Managerial Accounting work. Or I need an answer book for "Introduction to Managerial Accounting 2nd Edition McGraw-Hill/Brewer".
Please please pleaasseee.
I have finals coming up and need to figure out some of the problems I'm still not understanding.

have you tried Amazon for answer book?

1. Post Publishers has collected the following data for recent months:
Month Issues published Total cost
May 20,500 $18,100
June 22,300 19,630
July 18,700 16,570
August 21,200 18,695
a. Using the high-low method, find variable cost per unit and total fixed costs.
b. What is the estimated cost for a month in which 22,000 issues are published?

Managerial accounting totally depends on- which kind of business you have. Differences in accounting methods depend on a company’s business operations and its industry. So you have to tell me more about your business i.e. I would be able to help you.