as the finance manager of a company you are presented with the following project. the company is considering the purchase of a new piece of equipment which would cost $200,000. this equipment will have a four-year useful life and have a salvage value of $0 at the end of the four-year period. the project life is also 4-year. it is estimated that how many shelves does the company need to sell such that it will achieve an economic break-even