Accounting homework help

Looking for a knowledgable accountant that can help me with my homework. Based on US accounting standards. Here is an exampleBased upon the following data taken from the records of Bruce Inc., prepare a contribution margin analysis report for the year ended December 31, 2012. For Year Ended December 31, 2012 Actual Planned Difference Increase (Decrease) Sales $312,000 $325,000 $(13,000) Less: Variable cost of goods sold $169,200 $182,000 $(12,800) Variable selling and administrative expenses 32,400 39,000 (6,600) Total $201,600 $221,000 $(19,400) Contribution margin $110,400 $104,000 $ 6,400 Number of units sold 120,000 130,000 (10,000) Per unit: Sales price $2.60 $2.50 .10 Variable cost of goods sold 1.41 1.40 .01 Variable selling and administrative expenses .27 .30 (.03)