Retu Kimmel, Accounting, 6e Help I System Announcements Exercise 21-5 DeWitt Industries has adopted the following production budget for the first 4 months of 2017. Month Units Month Units January February 10,160 March 8,320 April 5,450 4,440 Each unit requires 5 pounds of raw materials costing $3 per pound. On December 31, 2016, the ending raw materials inventory was 9,480 pounds. Management wants to have a raw materials inventory at the end of the month equal to 20% of next month's production requirements Prepare a direct materials purchases budget by month for the first quarter