Omega Corp manufactures an intermediate component part, ACC-210 that is widely used in various household electronic products. Operating results, prepared for external reporting purposes, for the first three years of activity were as follows:

With increased competition from lower cost manufacturers, a competitor folded in Year 2, and during the process, offloaded all their remaining stocks on the market. As a result, Omega's sales dropped by 20% during Year 2 even though production increased during the year. Management was caught unawares, and had increased production in view of sales remaining constant at 50,000 units. The increased production was meant to provide the company with a buffer of protection against unexpected spurts in demand.

With the excess stocks carried into Year 3, management decided to cut production, as shown below:

Additional information about the company is given as follows:

Fixed manufacturing overhead costs $480,000

Fixed selling and administrative costs $140,000

Variable costs per unit: Manufacturing cost $2

Selling and administrative cost $1

• The fixed manufacturing overhead costs are applied to units of production on the basis of actual production for the year.
• The company uses a FIFO inventory flow assumption.

Omega's senior management is puzzled why profits doubled in Year 2 when sales declined by 20%, yet a loss was incurred in Year 3 when sales recovered to previous levels.

The company is exploring the adoption of Lean Production, which would result in zero inventory carried forward for Year 2 and Year 3. The pre-determined overhead absorption rate is based on 50,000 units production. Explain the differences between net operating income/(loss) reported using absorption costing and those reported using variable costing. Justify your explanation with a brief computation.