Sheridan Wig Shoppe carries a number of wigs that are made specifically for people who require them while undergoing medical treatment. They use a perpetual inventory system and the FIFO cost formula for valuing inventory. The following information is available regarding the inventory on hand at year end, December 31. Types: Unit Net Realizable Value Units Unit Cost Marilyn 14 $152 $148 Farrah 10 224 230 Jane 7 74 99 J-Lo 8 191 220 Cpt. Kirk 11 162 108