ocr: Unit stock valuation AC=. £22.00 Units are valued by measuring all the manufacturing costs incurred in bringing the product toits present location and condition, regardless of whether these costs are fixed or variable. Our only concern, theretore, is whether or not the costs can be classified against the production tunction. We can see here that this valuation includes the variable production costs of E17.00 as well as a 15.00 element which accounts for the fixed production costs.