4. Graphitia Design Company considers purchasing a computer system. The initial capital cost of the computer system is $3.oM. It can be used for 5 years. and that it will be sold for $23,000 at the end of" year 5. It is estimated that a total of 4 ofcers' salary can he saved annually. The yearly staff cost of an ofcer is SEEK. The system maintenance cost is xed at $400K per year