A company is going to change all light bulbs of its buliding. The initial cost is 57000. all bulbs has been replaced at the same time. what if the bulbs have been replaced during 5 yrs period....

Extracted text: A company is going to change all light bulbs of its buliding. The initial cost is 57000. all bulbs has been replaced at the same time. what if the bulbs have been replaced during 5 yrs period. Inflation rate is 3 percent. energy saving per yr is 6000 dollars. (compare replacement at the same time to the period of 5 yrs