saved Help Save & Exit Submit Check my work 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 units shipped and total shipping expense: Units Shipped Total Shipping Expense $ 1,900 $ 2,400 Month January 3 February 6 March 4 $ 1,800 April 5 $ 2,100 May June 7 $ 2,400 8 $ 3,400 July $ 1,300 2. Using the high-low method, estimate the cost formula for shipping expense. Variable shipping expense Fixed shipping expense per unit per month