Clean Industries sells pressure washers. Required: What is the economic order quantity in units if the annual demand is changed to 1,800 units and average daily demand is changed to 6 units for the pressure washers? (all of the other information remains the same). (4 marks - 1 mark for correct multi-choice answer and 3 other marks for showing correct work in the workspace question provided - pick correct multi-choice answer below and then add any work to Clean Industries answer workspace question). C)) 40 units (D 30 units (C) 50 units C) None of the other answers 60 units 80 units