public SummingDictionary <double> GetTallies()
{
SummingDictionary <double> tallies = new SummingDictionary <double>();
foreach (var cashflow in cashflows)
{
tallies.Add(cashflow.years, cashflow.amount);
}
return(tallies);
}
public double WAL()
{
SummingDictionary <double> tallies = GetTallies();
double num = 0;
double den = 0;
foreach (var tally in tallies)
{
if (tally.Value > 0)
{
num += tally.Key * tally.Value;
den += tally.Value;
}
}
return(num / den);
}