A factory uses 700.40 \(\mathrm{W}\) standard fluorescent lamps for its lighting. The lamps are to be replaced by 34/W high-efficiency lamps that can operate on the existing standard ballasts. The standard and high-efficiency fluorescent lamps cost \(\$ 1.80\) and \(\$ 2.50\) each, respectively. The factory operates \(3000 \mathrm{~h} /\) year, and all of the lamps operate during that period. Assuming the unit cost of electricity is 6 cents \(/ \mathrm{kWh}\) and the ballasts consume \(10 \%\) of the rated power of the lamps, calculate how much energy and money will be saved as a result of switching to the high-efficiency fluorescent lamps. Then, estimate the PP assuming an interest rate of \(6 \%\) and an inflation rate of \(3 \%\). Finally, calculate the levelized cost of the saved energy assuming the lamps last for 2 years.