Capital investment: BEB is planning the construction of a new loading ramp for its single mill. The initial cost of the investment is $$600,000,$ followed by an investment of $$200,00010$ years later and another investment of $$200,00020$ years later and finally an investment of $$1,000,000$ for environmental cleanup at the end of the project $30$ years from now. Efficiencies from the new ramp are expected to reduce costs by $$50,000$ per year $($at the end of every year$)$ for the life of the plant, which is currently estimated at $30$ years $($savings of $$50,000$ a year from $30$ years$).$

These savings can be assumed to be reinvested at a rate of $9\%$ pa$.$ What is the NPV of the project if BEB has a required rate of return of $7\%?$ Need help calculating the present value of the cash inflow.