Tony makes sandwiches for a cafeteria. This morning, he made 50 roast beef sandwiches, 75 ham and cheese sandwiches, and 16 tuna sandwiches. His boss wants 150 sandwiches total. How many more sandwiches must Tony make? A. 29 sandwiches B. 19 sandwiches C. 39 sandwiches D. 9 sandwiches