Darkrai Company sells only one product. For the last year, contribution margin was 40,000 and the sales were $80,000. The company had an operating profit of $10,000. If the company wants to increase its operating profit to 15,000 this year, what is the total sales in dollars they need to make? Select one: a. 100,000 b. 105,000 c. 120,000 d. 90,000