COMPANY sold 30,000 units of their product in 2020 for a total of $600,000. Cost of goods sold, which made up a portion of variable expenses was $9 per unit. The company's only other expenses were SG&A expenses, a mixed cost totaling $450,000. COMPANY'S contribution margin ratio was 0.5 for the year. How many units would COMPANY have to sell in order to break even