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 Shipping Expense Units Ronth Shipped January 4 $ 2,080 Tebruary 4 $2,980 March 5 $ 2,450 April 2 $1,272 May 3 $2,100 June 6 $2,820 July B $4,032 Ces 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