6. McCork Corporation sells 40,000 units of nebulous ambiguities every year. It costs them $100 to order more units, regardless of the order size. It costs McCork 63 cents per year to carry each unit. Using the Economic Order Quantity model, what should be McCork's optimal number of units per order? Round your answer to the nearest whole number of units. A. 356 B. 3,563 C. 283 D. 178 E. None of the above