The Rustic Welt Company is proposing to replace its old welt-making machinery with more modern equipment. The new equipment costs $9 million (the existing equipment has zero salvage value). The attraction of the new machinery is that it is expected to cut manufacturing costs from their current level of $8 a welt to $4. However, as the following table shows, there is some uncertainty both about future sales and about the performance of the new machinery:

Conduct a sensitivity analysis of the replacement decision, assuming a discount rate of 12%. Rustic Welt does not paytaxes.

Pessimistic Expected Optimistic Sales, millions of welts Manufacturing cost with new machinery, dollars per welt Economic life of new machinery, years 4 .5 .7 10 13