Saved ! Required information The following information applies to the questions displayed below.] Archer Company is a wholesaler of custom built air-conditioning units for commercial buildings. It gathered the following monthly data relating to unlts shipped and total shipping expense Units Shipped 2 Month January February March April May June July 3 4 6 7 1 Total Shipping Expense $ 2,100 $ 2,600 $ 2,000 $ 2,300 $ 2,600 $ 3,300 $ 1.500 2. Using the high-low method, estimate the cost formula for shipping expense. Vanable shipping expense Fixed shipping expense per unit per month