Keefer, Inc., began business on January 1, 2016. Information on its inventory purchases and sales during 2016 and 2017 follow: Inventory Purchases Date Units Cost per Unit Total January 1, 2016 March 15, 2016 May 15, 2016 August 1, 2016 September 3, 2016 December 5, 2016 85 100 90 100 125 50 550 $25 27 28 30 $ 2,125 2,700 2,520 3,000 3,875 1,600 $15,820 32 Total purchases-2016 February 20, 2017 March 29, 2017 July 1, 2017 August 20, 2017 November 3, 2017 100 100 100 80 530 $31 30 29 28 27 $4,650 3,000 2,900 2,800 2,160 $15,510 Total purchases-2017 Inventory Sales Units Price per Unit Total March 18, 2016 August 15, 2016 October 6, 2016 65 200 175 440 $50 52 53 $ 3,250 10,400 9,275 $22,925 Total sales-2016 February 12, 2017 June 2, 2017 September 30, 2017 100 200 210 510 $53 52 50 5,300 10,400 10,500 $26,200 Total sales-2017