Given the following information, answer the following questions: BioTec's fixed cost and breakeven in sales are $30,000 and $75,000, respectively. Question 15 (3 points) What is Bio Tec's contribution margin ratio? 20% 40% 30% 60% Question 16 (4 points) What is the variable cost if the sale price per unit is $40? $8.00 $24.00 $16.00 $40.00 Question 17 (3 points) What are the sales needed to obtain earnings before tax of $6,000? $120,000 $180,000 $ 60,000 $ 90,000