Sharpe Cutter is a small company that produces specialty knives for paper cutting machinery. The annual demand for a particular type of knife is 100,000 units. The demand is uniform over the 250 working days in a year. Sharpe Cutter produces this type of knife in lots and, on average, can produce 500 knives a day. The cost to set up a production lot is $280, and the annual holding cost is $1.10 per knife. a. Determine the economic production lot size (ELS). The economic production lot size is knives. (Enter your response rounded to the nearest whole number.)