How can I complete a flexible budget for a corporation?

What is its purpose? eliminate cyclical fluctuations in producation reports by ignoring variable costs compare actual and budgeted results at virtually every level of production reduce total time in preparing actual budget I think it is the second one, does a1 disagree?

1.Prepare a monthly flexible selling expense budget for Practer Company for sales volumes of $300,000, $400,000, and $600,000 based on the following data: Sales commissions 4% Sales manager's salary $70,000 per month Advertising expense $75,000 per...