A company has a contribution margin ratio (CMR) of 60% while fixed cost are $120,000 per month. The income tax rate is 30% Determine the sales (in dollars) required to earn target net income of $42,000 (per month). Select one: a. 180,000 .b. 200,000 c. 270,000 d. 300,000 . e. 405,000 f. none of the above