The economic analysis begins with the calculation of working capital, investment cost, and operational cost that is
needed to operate the production process. With knowing the price of electricity energy and fertilizer, the analysis
then continued by calculating the value of profit, cash flow, and economic parameters i.e. Net Present Value (NPV),
Internal Rate of Return (IRR), Profitability Index (PI), Average Rate of Return (ARR), and Payback Period (PP)
according to Suliyanto (2010) [12]