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: Units Shipped 4 4 Total Shipping Expense $ 1,960 $ 2,860 $ 2,300 $ 1,254 $ 2,010 $ 2,640 3,744 Month January February March April May June July un 3 6 8 $ 5. If seven air conditioners are shipped in August, estimate the total shipping expenses. Total shipping expense