Answer:
Determination of Inventory at the Lower of Cost or Market Value:
Item        Quantity    Cost    Market Value       Total
                    per Unit    per Unit       Determined Value
Birch          12        $253     $228          $2,736 (12 x $228)
Cypress       18           43       48            774 (18 x $43)
Mountain Ash  12          279      262           3,144  (12 x $262)
Spruce       50         275      266          13,300 (50 x $266)
Willow       29          291      299          8,439 (29 x $291)
Value of Inventory                           $28,393
Explanation:
It is a requirement of GAAP that inventory be valued at the lesser amount of its incurred cost and the amount for which it can likely be sold—its net realizable value(NRV).  The Lower of Cost or Market Value or net realizable value (LCNRV) is the method of valuing inventory in compliance with this idea that prudently avoids the overstatement of the amount of inventory.