Birmingham's Stereo Shop projects to achieve break Even sales volume on October 15, 2018. Its contribution per unit is $6,500. How many more stereos must it project to sell beyond November 15 if it wants to achieve a profit of $598,000 by November 30, 2018. a) The information given is insufficient to determine the number of stereos b) 92 units c) Birmingham needs to achieve the same volume it achieved up to October 15 d) 77 units