Which of the following costs are mixed? Cost 10,000 Units 1. $100,000 2. 40,000 3. 90,000 30,000 Units $300,000 60,000 90,000 Select one: O A. only 2 O B. only 3 O c. only 1 Which of the following costs are fixed? Cost 10,000 Units 1. $100,000 2. 40,000 3. 90,000 30,000 Units $300,000 60,000 90,000 Select one: O A. 2 OB. 1 O C. 3