Apply raw and weighted indices to escalation to calculate cost estimates. Which of the following statement accurately describe the weighted index, which is used with escalation to calculate cost estimates? (Select two that apply) A. The weighted index will always show 1 or 100% for the base year (BY). B. To use the weighted index to calculate the inflation-adjusted forecast, combine the inflation rate data with the outlay rates. C. The weighted index allows the comparison of costs several years so that cost growths and other impacts (e.g., learning curves) can be observed. D. The weighted index takes into account the historical outlay patterns of the appropriations and inflation rates associated with the fiscal years (FY[s]) when cash flows out of the U.S. Treasury (outlay)