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 January Shipped Expense $2,080 February 4 $2,980 March 5 $2,450 April 2 $1,272 May 3 $2,100 June 6 July B $ 2,820 $4,032 9. Given the facts in part 3-8, estimate the total contribution margin for August if seven air conditioners are produced and sold. Total contribution margin