Fitzpatrick Inc. Planned and manufactured 500,000 units of its single product in 2013, its first year of operations. Variable manufacturing costs were $40 per unit of production. Planned fixed manufacturing costs were $1,200,000. Marketing and administrative costs (all fixed) were $500,000 in 2013. Fitzpatrick sold 450,000 units of products in 2013 at $50 per unit.

1. Determine Fitzpatrick incs operating income using full costing.

2. Determine Fitzpatrick incs operating income using variable costing.

3. Explain the difference between the operating incomes in requirements 1 and 2.