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 $1,840 February 4 $2,740 March 5 $2,150 April 2 $1,236 May 3 $1,920 June $2,460 July $3,456 6 8 5. If seven air conditioners are shipped in August, estimate the total shipping expenses. Total shipping expense