Required information CC7-1 (Algo) Accounting for Changing Inventory Costs [LO 7-3, LO 7-5] In October, Nicole eliminated all existing inventory of cosmetic items. The trouble of ordering and tracking each product line had exceeded the profits earned. In December, a supplier asked her to sell a prepackaged spa kit. Feeling she could manage a single product line, Nicole agreed. Nicole's Getaway Spa (NGS) would make monthly purchases from the supplier at a cost that included production costs and a transportation charge. NGS would keep track of its new inventory using a perpetual inventory system. On December 31 of last year, NGS had 10 units at a total cost of $7.20 per unit. Nicole purchased 25 more units at $8.80 in February. In March, Nicole purchased 10 units at $10.80 per unit. In May, 40 units were purchased at $10.6 per unit. In June, NGS sold 40 units at a selling price of $12.80 per unit and 30 units at $10.80 per unit.