The highest value of total cost was $71,000 in June for Acai Beverages, Inc. Its lowest value of total cost was $58,000 in December. The company makes a single product. The production volume in June and December were 14,000 and 8,000 units, respectively. What is the variable cost per unit? (Round your answer to the nearest cent.) A. $11.83 per unit B. $1.63 per unit c. $0.93 per unit D. $2.17 per unit