You are analyzing a project and have developed the following estimates. The depreciation is $11,000 a year and the tax rate is 34 percent. What is the worst-case operating cash flow?

Base case Lower Bound Upper Bound
Unit sales 3,100 2500 3400
Sales price $19 $16 $22
Variable cost per unit $12 $14 $10
Fixed costs $8200 $8500 $7800

a. -$1,311
b. -$641
c. $274
d. $599
e. $1,206