High-Low Biblio Files Company is the chief competitor of Cover-to-Cover Company in the bookshelf business. Biblio Files is analyzing its manufacturing costs, and has compiled the following data for the first six months of the year. After reviewing the data, answer questions (1) through (3) that follow Units Produced Total Cost January 4,360 units $65,600 February 275 6,250 March 1,000 15,000 April 7.775 118,750 May 1,750 32,500 June 3,015 48,000 1. From the data previously provided, help Biblio Files Company estimate the fixed and variable portions of its total costs using the high-low method.