Indigo Furniture Ltd. uses a perpetual inventory system and has a beginning inventory, as at June 1, of 490 bookcases at a cost of $126 each. During June, the company had the following purchases and sales of bookcases: Date June 6 10 14 16 26 Purchases Units Unit Cost 1,220 1,870 1,050 $128 129 130 Units 970 1,670 Sales Unit Price $197 202 4 Part b please