Derived
Cumulative-inflation-rate (t) = if isCurrentYear or isPast, 1, else Cumulate-inflation-rate(t-1) * (1 + inflation.monthly_inflation_rate(t))
"Cumulative Inflation Rate" = if (isCurrent(parent(parent(Fiscal),"Fiscal")), 1, if (isPast(Fiscal), 1, "Cumulative Inflation Rate"[previous(Fiscal)] * (1 + Inflation_RS.MONTHLY_INFLATION_RATE)))