Monthly Purchases Day of Date Units Unit Cost Total Cost Running Sum of Units January 1 4,000 $25.00 $100,000 4,000 January 31 2,800 $25.05 $70,140 6,800 February 28 3,100 $25.15 $77,965 9,900 March 31 3,000 $25.25 $75,750 12,900 April 30 2,800 $25.30 $70,840 15,700 May 31 4,200 $25.40 $106,680 19,900 June 30 4,340 $25.60 $111,104 24,240 July 31 3,720 $25.75 $95,790 27,960 August 31 3,300 $25.80 $85,140 31,260 September 30 3,000 $25.85 $77,550 34,260 October 31 3,100 $25.85 $80,135 37,360 November 30 4,400 $25.90 $113,960 41,760 December 31 3,000 $26.00 $78,000 44,760