Whistles-R-Us manufacturers safety whistle keychains. They have the following information available to prepare their master budget: October November December Unit Sales 3,500 3,750 4,200 Whistles-R-Us sells each whistle for $12. They have a desired ending inventory for production of 20% of the next month's budgeted sales in units. How many units does Whistles-R-Us need to produce in November? 3,660 units 3,890 units 3,840 units 46,680 units