This standard recipe makes 2 1/2 cups:
2 pounds vine-ripened red and/or orange tomatoes (about 5 medium), chopped
2 fresh serrano or jalapeño chiles, chopped
1/4 medium onion (preferably white), diced
1/2 cup fresh cilantro sprigs (3.5 ounces), chopped
1 teaspoon minced garlic (1 clove)
1 teaspoon sugar
1 1/2 tablespoons fresh lime juice

So you would purchase about:

72 pounds tomatoes
72 fresh serrano or jalapeño chiles
9 medium onion (preferably white)
16 cups fresh cilantro sprigs (112 ounces or 7 pounds)
1/3 cup minced garlic
1/3 cup sugar
1 1/2 cup fresh lime juice

This is a bulkier, juicier, more Americanized recipe, more veg, makes about 4 cups

2 1/4 pounds vine-ripened red and/or orange tomatoes (about 5 medium)(3-1/2 cups)
1 large green pepper, chopped
1 medium onion, chopped
1 serrano pepper, seeded and chopped
1 jalapeno pepper, seeded and chopped
1 tablespoon sugar
2-1/4 teaspoons salt
1 garlic clove, minced
3/4 teaspoon ground cumin
1 can (6 ounces) tomato paste
1/4 cup white vinegar
2 tablespoons lemon juice

So you would purchase:

30 pounds vine-ripened red and/or orange tomatoes (about 5 medium)(3-1/2 cups)
12 large green pepper, chopped
12 medium onion, chopped
12 serrano pepper, seeded and chopped
12 jalapeno pepper, seeded and chopped
3/4 cup sugar
1/2 cup salt
12 garlic clove, minced
3 tablepoons ground cumin
12 can (6 ounces) tomato paste
3 cups white vinegar
1 1/2 cups lemon juice