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: Unite Total Shipping Expense Month January Shipped $ 2,080 February 4 $ 2,980 March 5 $ 2,450 April 2 $1,272 May 3 $2,100 June " $2,820 July $4,032 7. if 10 air conditioners are shipped in October, estimate the variable shipping expense. Variable expense