Explanation on how to solve #4?

4. The level of inventory ofa manufactured product has increased by 7.000 units during a period. The following data are also available: Unit manufacturing costs of the period Unit operating expenses of the period $12.00 4.00 Fixed $6.00 I .50 What would be the effect on income from operations if absorption costing is used rather than variable costing? u. $42,000 decrease GB42,ooo increase $52,500 increase U. $52,500 decrease