23. IRR NPV CUM. NET CASH FLOW PAYBACK PERIOD ROI IRR NPV CUM. NET CASH FLOW PAYBACK PERIOD ROI IRR NPV CUM. NET CASH FLOW PAYBACK PERIOD ROI IRR NPV CUM. NET CASH FLOW PAYBACK PERIOD ROI IRR NPV CUM. NET CASH FLOW PAYBACK PERIOD ROI WELKE FINANCIËLE RATIO’S?