Calories in chicken breast on MFP?

Hi, just wondering if anyone knows what the calories for roast chicken breast in the database are based on? It says in 100g cooked there are 167 cals and 4g fat. However,r, on my package of skinless chicken breasts it says 127 cals per 100g cooked and 1g of fat. Is the MFP info based on breast roasted as part of a whole chicken and therefore has some tagalong fats from the skin?

I'm just wondering which one is correct.

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