i think i got it now. If it is PBDIT then we just deduct the tax first and the depreciation gets deducted after that if the assets are being replaced plus additional assets. If no replacement of assets we do not deduct the depreciation after tax. If PBIT we add the depreciation, deduct the tax and then deduct depreciation again if replacing. Tax on interest?????? Or do we have to have NOPAT specified? Or de we do nothing about interest at all, tax or interest?