In December, Sara's Sodas produced 4.2 million liters of the beverage. Manufacturing overhead was $1,400,000 and the cost per liter was $0.40. Labor costs were 25 percent of materials cost. Required: a. Calculate the materials cost for December. (Enter your answer in dollars not in millions.) b. Calculate the labor cost for December. (Enter your answer in dollars not in millions.) a. Materials cost in December b. Labor cost in December