Finding a Total To-Date Sum

You can use MathML to find a total, to-date sum of a timephased attribute by using the following syntax:

<Calculation>
  <Expression>
    <math xmlns:mathml="http://www.w3.org/1998/Math/MathML">
      <lambda>
        <bvar>
          <ci>a</ci>
        </bvar>
        <apply>
          <plus />
          <ci>a</ci>
        </apply>
      </lambda>
    </math>
  </Expression>
  <RHSVariable name="%RangeCalculation%SUM%Cost-Labor-Total%CURRENCY
     %CALENDAR_YEAR%Start%Today" identifier="a" />
</Calculation>