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, 880 February $ 2, 780 March $ 2, 200 April $ 1, 242 CO GW NUA May $ 1, 950 June $ 2, 520 July $ 3, 552 7. If 10 air conditioners are shipped In October, estimate the variable shipping expense. Variable expense