Finding Internal Rate of Return

You can use MathML to find internal rate of return by using the following syntax:
<Calculation>
  <Expression className="PacificEdgeSoftware.Data.Calculations.Programmatic.InternalRateOfReturnWithGuess30,SerenaSoftware.Data" />
    <RHSVariable name="cMonthly-Discount-Rate" identifier="rate" />
    <RHSVariable name="%RangeCalculation%NPV%Cost-Total%CURRENCY%CALENDAR_MONTH %StartMS%END%" identifier="costs" />
    <RHSVariable name="%RangeCalculation%NPV%Benefits%CURRENCY%CALENDAR_MONTH %StartMS%END%" identifier="benefits" />
  </Expression>
</Calculation>