64) 64) The highest value of total cost was $75,000 in June for Mantilla Beverages Inc. Its lowest value dof tal cost was $50,000 in December. The company makes a single product. The production volume to in June and December were 13,000 and 8,000 units, respectively. What is the variable cost per month? D) $6.25 per unit C) $5.77 per unit B) $5.00 per unit A) $9.38 per unit