The annual profit from the sales of an item is equal to the annual revenue minus the annual cost for that item. The revenue from that item is equal to the number of units sold times the price per unit. If n units of a portable heart monitor were sold in 2012 at a price of $65 each, and the annual cost to produce n units was $(20,000 + 10n), then which of the following statements indicates that the total profit for this heart monitor in 2012 was greater than $500,000?

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A) B) C) 500,000 < D) 500,000 < 55n - 20,000 500,000 > 55n - 20,000 55n+20,000n 500,000 < 75n - 20,000n