Jones Ice Cream Stand is operated by Mr. Jones and experiences different sales patterns throughout the year. To plan for the future, Mr. Jones wants to determine its cost behavior patterns. He has the following information available about the ice cream stand's operating costs and the number of soft serve cones served. Month Number of ice cream cones Total operating costs April 790 $950 May 825 $975 June 1,125 $1,000 July 2,000 $1,450 August 1,500 $1,175 September 900 $1,500 The variable cost per ice cream cone using the high minus low method is?