The Main Street Ice cream shop has recorded its total ice cream sales, in gallons, for the last nine years, as given below in the attached table.

Year 2011 2012 2013 2014 2015 2016 2017 2018 2019 January 26.70 24.40 31.40 28.90 27.80 34.50 36.40 29.40 31.00 February 37.60 32.80 28.90 29.10 32.20 30.50 34.10 36.10 32.40 March 31.90 40.40 40.70 38.50 39.20 37.30 40.10 41.60 35.40 April 46.10 49.30 48.40 45.10 46.80 45.90 47.60 51.30 46.40 May 58.00 59.30 58.40 57.20 57.60 59.40 54.90 63.30 55.60 June 70.50 64.80 66.10 65.10 68.50 67.80 66.60 70.00 67.80 July 74.70 73.50 71.00 71.70 73.70 72.80 73.10 74.60 69.50 August 74.60 70.40 70.50 70.30 75.50 71.60 73.30 73.80 70.40 September 62.10 65.40 63.20 65.40 64.60 64.70 64.60 63.70 63.90 October 53.30 55.40 54.00 54.30 50.80 55.30 58.30 56.40 52.50 November 44.60 45.40 42.30 43.90 46.70 42.80 48.50 45.20 42.90 December 39.50 31.30 35.50 36.10 32.80 21.70 40.70 36.00 34.80