Given the questions below, it is correct to state that:

Choose one or more:

a. When goods are sold, the book value of the goods must be calculated. If the book value is lower than the sale value, there will be a book loss corresponding to the difference between these values. The book loss must be subtracted from taxable income; b. In economic engineering problems it is important to consider income tax, since a project can become feasible if we take income tax into account. c. Physical and functional depreciation of a piece of equipment have different ways of calculation in economic engineering. d. In any productive system there is a gradual loss of initial value of productive assets , this is why depreciation must be considered. e. In some cases, the search for financing can help in the viability of problems, when considering the income tax