Freddy is helping buy ingredients for salads for the school spaghetti dinner. He bought 10 pounds of onions at $0.69 per pound, 100 pounds of tomateos at $0.99 pounds, 1,000 pounds of bread crumbs at $0.09 per pound, and 100 pounds of lettuce at $0.69 per pound. Which of the things he bought cost the most?