hi please help & show all work :)

need both part A&B

A condensed income statement by product line for Celestial Beverage Inc. indicated the following for Star Cola for the past year: It is estimated that 20% of the cost of goods sold represents fixed factory overhead costs and that 30% of the operating expenses are fixed. Because Star Cola is only one of many products, the fixed costs will not be materially affected if the product is discontinued. a. Prepare a differential analysis, dated January 21 to determine whether Star Cola should be continued (Alternative 1) or discontinued (Alternative 2). b. 'Should Star Cola be retained? Explain