A firm uses graphical techniques in its aggregate planning efforts. Over the next twelve months (its intermediate period), it estimates the sum of demands to be 100,000 units. The firm has 250 production days per year. In January, which has 20 production days, demand is estimated to be 12,000 units. Which of the following is correct? A. level production is approximately 400 units per month O B. the firm must hire workers between December and January P O C. level production of 400 units per day is below the January requirement D. level production is approximately 500 units per day 0687 O E. the January requirement is below level production of 400 units