(tco c) paul is quickly moving up in the accounting department of rac inc. it is year-end; he has just received news that the estimates of the estimated useful life and salvage values were wrong and must be changed. of course, that changes the depreciation expense and accumulated depreciation. paul calls his wife to explain why he will be late again. upon the conversation, he is pondering on a comment his wife made; she said, "i'm no accountant, but after four years, you would think that the company could get done how its estimates affect expenses and those other accounts." what might the company be doing, and what should paul do from an ethical reasoning view?