per unit and in total as volume decreases. Total mixed costs will Increase, increase Decrease, decrease Increase, decrease Decrease, increase QUESTION 10 Which of the following is irrelevant to the decision to replace a piece of equipment with a new model that requires less labor to operate, less energy less maintenance Labor cost for the new machine Maintenance cost of the old machine Energy cost for the new machine Depreciation on the old machine QUESTION 11 Which of the following is a lean strategy? Group like machines together. Produce in smaller batches than a traditional system. Lengthen setup times relative to a traditional system. Maintain a higher level of inventory than a traditional system