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Contemporary Electronic Center began October with 90 units of merchandise inventory that cost $70 each. During October, the store made the following purc (Click the icon to view the purchases.) Contemporary uses the periodic inventory system, and the physical count at October 31 indicates that 110 units of merchandise inventory are on hand. Read the requirements. Requirement 1. Determine the ending merchandise inventory and cost of goods sold amounts for the October financial statements using the FIFO, LIFO, and weighted-average inventory costing methods. Data table