Answer:
 $52,860
Explanation:
The computation of the ending inventory using the  lower of cost or market method is shown below:
Product           Cost      Net realizable value Lower of cost or NRV
RSK-89013 600 × $38 = $22,800 600 × $47 = $28,800  $22,800
LKW-91247 420 × $47 = $19,740   420 × $40 = $16,800     $16,800
QEC-57429  510 × $26 = $13,260   510 × $32 = $16,320     $13,260
Carrying value of the ending inventory is                    $52,860