Required information [The following information applies to the questions displayed below.] Phillips Company manufactures air-conditioning units for commercial buildings and has noticed considerable variation in shipping expenses from month to month as per the data below. Total Shipping Unite Month Shipped Expense January $ 2,080 February 4 $ 2,980 March 5 $2,450 April 2 $ 1,272 May $ 2,100 June $ 2,820 July 8 $ 4,032 6. If nine air conditioners are shipped in September, estimate the fixed shipping expenses. Fixed expense