revenue. 58000
less Driver cost. (42000)
less annual salary. ( 1000)
less annual cost. (3000)
earning before deprecation. 12000
less deprecation 55000 - 15000/5 = (8000)
earnings after depreciation. 4000
since there is no taxation you can go on and calculate net present value by using this formular
NPV = PVCIF - PVCOF