A drug store is looking into the possibility of installing a 24/7-automated prescription refill system to increase its projected revenues by \$ 20,000 per year over the next 5 years. Annual expenses to maintain the system are expected to be \$ 5,000. The system will cost \$ 50,000 and will have no market value at the end of the 5 -year study period. The store’s MARR is 20 \% per year. Use the AW method to evaluate this investment. (5.5)