I got so confused about this questions. please take a look and figure out for me. thanks

You would like to know the minimum level of sales that is needed for a project to be accepted based on its net present value. To determine that sales level you should compute the Precise Machinery is analyzing a proposed project. The company expects to sell 2,100 units, give or take 5 percent. The expected variable cost per unit is $260 and the expected fixed costs are $589,000. Cost estimates are considered accurate within a plus or minus 4 percent range. The depreciation expense is $129,000. The sales price is estimated at $750 per unit, give or take 2 percent. What is the amount of the total costs per unit under the best case scenario? You would like to know the minimum level of sales that is needed for a project to be accepted based on its net present value. To determine that sales level you should compute the Precise Machinery is analyzing a proposed project. The company expects to sell 2,100 units, give or take 5 percent. The expected variable cost per unit is $260 and the expected fixed costs are $589,000. Cost estimates are considered accurate within a plus or minus 4 percent range. The depreciation expense is $129,000. The sales price is estimated at $750 per unit, give or take 2 percent. What is the amount of the total costs per unit under the best case scenario