15. T he level of inventory of a manufactured product increases by 5,000 units during a period. The following data are also available: Unit manufacturing costs during the period Unit operating expenses during the period Variable $24.00 8.00 Fixed $10.00 3.00 effect on income from operations ifvariablecostingis usedratherthan absorption costing? a. $50,000 decrease b. $50,000 increase c. $65,000 increase d. $65,000 decrease