据我所知，Operating Income = EBIT,
Net Operating Income after Tax = EBIT×(1 - Marginal Tax Rate)
具体来说有如下关系：

EBITDA
-  Depreciation & Amortization
+ Other Operating Income(Exp)
-----------------------------------------------
= Operating Income (EBIT)
× (1- Marginal Tax Rate)
-----------------------------------------------
= Net Operating Income after Tax (NOPAT)

为什么operating income会等于EBIT呢。EBIT不是息税前收入吗。可是企业的收入不是应该包括operating income和金融活动所得的收入吗