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Gent Company uses a periodic inventory system. For May, when the company sold 530 units, the following information is available: Units Unit cost $ 370 May 1 inventory May 19 purchase May 29 purchase 400 9 410 11 1 180 Instruction: Compute the May 31 inventory and the May cost of goods sold using: a) the average-cost method (55 points) b) FIFO method (45 points)