Mct Company's total sales are $210,000. The company's direct material cost is $25,000. Its direct labor cost is $34,00 Its total manufacturing overhead costs consists of $15,000 variable costs and $30,000 fixed costs. Its total selling and administrative expense consists of $6,000 variable costs and 17,000 fixed costs. What is the total contribution margin? Select one: a. $136,000 b. $189,000 c. $106,000 d. None of the answers given e. $140,000 f. $130,000