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 Units Shipping Month Shipped Expense January 4 $2,360 February 4 $ 3,260 March 5 $ 2,800 April 2 $1,314 May 3 $2,310 June 6 $3,240 July $4,704 6. If nine air conditioners are shipped in September, estimate the fixed shipping expenses. Fixed expense