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Start depreciating the new asset (the factory) using the straight line method over a period of time, making some reasonable assumptions about scrap value and useful life.

For changes in net working capital, you have the sales, so you can back into the accounts receivable via an assumption for DSO. You also have the COGS (variable costs) so you can back into inventory and AP with assumptions for DPO and inventory turns.

For CapEx, check what the return on the factory asset is at the moment, and looking at the sales forecast, back into the necessary capital expenditures to keep ROA flat – it doesn't change that much in stable industries.

For the comapny's EBITDA, there is not much to calculate. In your case sales – variable expenses – fixed expenses = EBITDA. Does this really turn out to be negative? Remember not to include $200mm in capital expense in your 2010 EBITDA calculations.

This should be everything you need to do a decent DCF with reasonable assumptions. That's the Enterprise value. Subtract the $100mm debt and you have the Equity value.

Multiples can now be used to test if your numbers are reasonable or if you need to re-evaluate your assumptions.