A company decided to implement the Energy Saving Measures $($ESM$)$ recommended by the energy manager. One of the ESM is to install Variable Speed Drive $($VSD$)$ to the constant speed chilled water pump system to increase the performance of the system. $$ The VSD can be purchased and installed for a cost of RM$70,000.$ The retrofit system is estimated to save $45,000$ kWh per year for its economic life of $10$ years. The maintenance costs are RM$3,500$ per year. The discounted rate is at $3\%.$ The company pays RM$0\mathrm{.}30$ per kWh for electricity, and the system will have a salvage value of RM$5,000$ at the end of its life. By using the above information, calculate: $$ i$.$ Total cash flow by using cash flow tabular form. $$ ii$.$ Simple payback period, SP$.$ iii.$$ Net Present Value, NPV$.$