which of the folloing are correct? production overheads included in valuing inventory should be calculated by reference to the company's normal level of production during the period the statement of financial position value of inventory should be as close as possible to net realizable value The valuation of finished goods inventory must include production overheads in assessing net realisable value, inventory items must be considered separately, or in groups of similar items, not by taking the inventoey value as a whole