Nelson Corporation sells three different products. The following information is available on December 31: Inventory Item Units Cost per unit Market value per unit X 300 $4.00 $3.50 Y $2.00 $1.50 1500 $3.00 $4.00 600 Z After applying the lower-of-cost-or-net-realizable-value rule to each item, what will Nelson's total ending inventory balance be? O $6900 $7950 $6600 $6450