please give the excel formulas

12. (Cash-flow analysis) A company is considering whether to buy a regular or color photocopier for the office. The cost of the regular machine is $10.000 its life span is 5 years, and the company has to pay another $1,500 annually in maintenance costs. The color photocopier's price is $30,000, its life span is also 5 years, and the annual maintenance costs are $4,500. Compared to the regular photocopier, the color photocopier is expected to increase the revenue of the office by $8,500 annually before taxes. For both machines. the depreciation is straight-line to zero salvage value, and this salvage value is also the assumed market value at the end of the machines' lives. Assuming that the company is profitable and pays 40% corporate tax, the relevant dis- count rate is 11%. Which photocopy machine should the firm buy