Power Co. is a manufacturer and Slack Co., its 100% - owned subsidiary, is a retailer. The companies are vertically integrated. Thus, Slack purchases all of its inventory from Power. On January 1, Slack's inventory was $30,000. For the Year ended December 31, Its purchases were $150,000, and its cost of sales was $166,500. Power's sales to flack reflect a 50% gross profit on sales. Slack then resells the goods to outside entities at a 40% gross profit on sales. At what amount should be intercompany inventory purchase be reported in the consolidated balance sheet at December 31?

a) $16,500

b) $9,000

c) $13,500

d)$6,750