annual_to_future        Calculate future value from a uniform annual
                        payment 'annual_to_future' Compute future
                        values from uniform annual payments using
                        uniform series compound amount factor (uscaf)
annual_to_present       Calculate present value from a uniform annual
                        payment 'annual_to_present' Compute present
                        value from uniform annual payments using
                        uniform series present worth factor (uswf)
cashflow                Calculate present value and annual value from a
                        given future payments of cash flows 'cashflow'
                        Compute a given cash flow data's present value
                        and annual value. The first column is the cash
                        flow year;the rest is the cash flow money. The
                        number of rows is the lifespan
effective_i             Calculate effective annual interest rate for a
                        known nominal rate and compounding period per
                        year 'effective_i' Compute future value nominal
                        rate and compounding period per year, and
                        frequency.
future_to_annual        Compute annual payment value from future value
                        'future_to_annual' calculate annual value from
                        future value using the accumulated amount after
                        years using sinking fund factor (sff)
future_to_present       Compute present values from future payments (or
                        cash flow) 'future_to_present' calculate
                        present value from future value using present
                        worth factor (pwf)
gradient_to_annual      Calculate annual value from uniform gradient
                        payment 'gradient_to_annual' Compute annual
                        value from uniform gradient payments using
                        uniform gra present worth factor (ugaw)
gradient_to_future      Calculate future value from uniform gradient
                        payment 'gradient_to_future' Compute future
                        value from uniform gradient payments using
                        uniform gradient present worth factor (ugfw)
gradient_to_present     Calculate present value from uniform gradient
                        payment 'gradient_to_present' Compute present
                        value from uniform gradient payments using
                        uniform gradient present worth factor (ugpw)
interest_during_construction
                        Compute interest during construction
                        'interest_during_construction' calculate
                        interest during construction using a monthly
                        discount factor
om_distribute           Calculate the present value of periodic
                        operations and maintenance costs
                        'om_distribute' Distribute periodic present
                        value operations and maintenance costs over a
                        project life span, discount over project, and
                        compute present value
present_to_annual       Compute annual payment from present value
                        'present_to_annual' Compute uniform series
                        annual payments from present value using
                        capital recovery factor (crf)
present_to_future       Compute future values from present value
