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 (Alternativ 2). If an amount is zero, enter zero " 0 ". Use a minus sign to indicate a loss. b. Should Star Cola be retained? Explain. As indicated by the differential analysis in part (A), the income would by s If the product is discontinued