How can a costco salad contain 900 calories?

well.... costco kirkland apple pecan cranberry salad (canada) contains about 971 calories but when you check the nutrition label, there's 0 fat, 0 carbs, 0 protien and the rest is 0 too( 0 iron, 0 vitamin, 0 glucose, 0 sugar etc.)??!! then from where did the calories come from if the whole thing is 0???