Suzy's Cool Treatz is a snow cone stand near the local park. To plan for the future, the owner wants to determine her cost behavior patterns. She has the following information available about her operating costs and the number of snow cones served. Number of snow Total operating Month cones costs January 3,500 $5,000 February 3,800 $4,800 March 5,000 $6,800 April 3,600 $5,450 May 4,700 $6,200 June 4,250 $5,950 Suzy uses the high-low method to determine her operating cost equation. What are her estimated costs at 4,428 snow cones? When calculating the variable cost per unit, round your answer to two decimal places before completing your calculations. Do not use dollar signs, commas or decimals in your answer. Input your answer to the nearest whole number.