all 3 please

QUESTION 18 Sunk costs are never relevant in decision making. True False QUESTION 19 Direct costs: A) are incurred to benefit a particular accounting period. E are incurred due to a specific decision. C) can be easily traced to a particular cost object. D) are the variable costs of producing a product. QUESTION 20 A complete income statement need not be prepared as part of a differential cost analysis. True False QUESTION 21