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