which of the following statements regarding the valuing of costs and benefits is not correct? In the absence of competitive markets we can use one - sided prices to determine exact cash values. The fast step m evaluating a project is to identic. its costs and benefits. 35&F. Competitive market prices allow us to calculate the value of a decision without worrying about the tastes or opinions of the decision maker iD Because competitive markets exist foe most commodities and financial assets, we can use them to determine cash \ ahies and evaluate decisions in most situations