Exercise 21-5 Dallas Industries has adopted the following production budget for the first 4 months of 2014. Month Units Month Units January February 10,160 March 8,420 April 5,460 4,460 Each unit requires 3 pounds of raw materials costing $4 per pound. On December 31, 2013, the ending raw materials inventory was 9,170 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