The following data have been collected for four different cost items. Cost Item Cost at 100 units Cost at 140 units W $8,000 $10,500 X $5,000 $5,000 Y $6,500 $9,100 Z $6,700 $8,580 Which of the following classifications of these cost items by cost behavior is correct? Cost W Cost X Cost Y Cost Z A Variable Fixed Mixed Variable B Mixed Fixed Variable Mixed C Variable Fixed Variable Variable D Mixed Fixed Mixed Mixed The following data have been collected for four different cost items. Cost Item Cost at 100 units Cost at 140 units W $8,000 $10,500 X $5,000 $5,000 Y $6,500 $9,100 Z $6,700 $8,580 Which of the following classifications of these cost items by cost behavior is correct? Cost W Cost X Cost Y Cost Z A Variable Fixed Mixed Variable B Mixed Fixed Variable Mixed C Variable Fixed Variable Variable D Mixed Fixed Mixed Mixed Choice B Choice D Choice C Choice A