The level of inventory of a manufactured product has increased by 8,293 units during a period. The following data are also available: Variable Fixed $10 $4 $5 Unit manufacturing costs of the period Unit operating expenses of the period What would be the effect on income from operations if absorption costing is used rather than variable costing? a. $33,172 increase b. $74,637 increase c. $33,172 decrease d. $74,637 decrease