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E9.4 (LO 2), AP Liau Automotive produces and sells automobile batteries, the heavy-duty HD-240. The 2020 sales forecast is as follows. The January 1, 2020, inventory of HD-240 is 2,000 units. Management desires an ending inventory each quarter equal to 40% of the next quarter's sales. Sales in the first quarter of 2021 are expected to be 25% higher than sales in the same quarter in 2020. Instructions Prepare quarterly production budgets for each quarter and in total for 2020