36.
Matthew is making nachos. For every 1 ounce of chicken, he uses 3 ounces of tortilla chips, 2 ounces of shredded cheese, and 4 ounces of a mixture of tomatoes, onions, and peppers. He makes a total of 30 ounces of nachos for his family for dinner. How many ounces of shredded cheese does he use?