Need help with this problem. Please show me how to work this one:

The level of inventory of a manufactured product has increased by 8,000 units during a period. The following data are also available
Unit manufacturing costs of the period: Variable: $24 Fixed: $10
Unit operating expenses of the period: Variable: 8 Fixed:3
What souled be the effect on income from operations if variable costing is used rather than absorption costing?
A. $80,000 decrease
B. $80,000 increase
C. $88,000 increase
D. $104,000 increase