The most likely outcomes for a particular project are estimated as follows:

Unit price: $50

Variable cost: $30

Fixed cost: $300,000

Expected sales: 30,000 units per year

However, you recognize that some of these estimates are subject to error. Suppose that each variable may turn out to be either 10% higher or 10% lower than the initial estimate. The project will last for 10 years and requires an initial investment of $1 million, which will be depreciated straight-line over the project life to a final value of zero. The firm's tax rate is 35%, and the required rate of return is 12%.

a. What is project NPV in the best-case scenario that is, assuming all variables take on the best possible value?

b. What about the worst-case scenario?