3 Part 1 of 10 10 points Required information Foundational Exercises [LO2, LO3] [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 Total Shipping Expense $ 2,160 eBook Print References Month January February March April May June July 452368 $ 3,060 $ 2,550 $ 1,284 $ 2,160 $ 2,940 $ 4,224 Foundational 3-2 2. Using the high-low method, what is the variable cost per unit to ship air conditioners? Variable cost per unit