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 Unita Month Shipped January 4 $ 2,080 February 4 $2,980 March 3 $ 2,450 April 2 $1,272 May June July 3 2,100 6 $2,820 $4,032 8. If the air conditioners have an average sales price of $6,500, variable direct manufacturing costs are $3,250 per unit, variable manufacturing overhead costs are $1,300 per unit, and variable selling and administration costs (excluding shipping) are $260 per unit, what is the contribution margin per unit? Contsbution margin per unit