manufacturing the memory chips 250 days in a year. Setup cost to produce the memory chips is $800 and the item has a holding cost of $10 per unit per year. How many production runs per year are needed if the manufacturer chooses to produce at the economic production lot size (ELS)? A. fewer than or equal to 15 runs B. greater than 19 runs C. greater than 17 runs but fewer than or equal to 19 runs D. greater than 15 runs but fewer than or equal to 17 runs