What of the following is a basic principle when estimating a project cash flows a only direct effects of a project should be included in cash flow calculations be cash flow should be measured on an incremental basis cash flow should be measured on a pretax basis or cash flow should ignored appreciation because it's a non$-$cash charge The decision by the municipal transportation authority to either refurbish existing buses to buy new large buses or to supplement the existing fleet with mini buses is an example of a contingent projects be mutually exclusive projects independent projects or D separable projects The decision by the mutual