Okay...here's how you do it:
160 oz X 1gm/0.035oz = 4571.4grams of chicken breast
Now, there is approximately 27grams of protein per 86 grams of chicken breast therefore,
4571.4grams chicken X 27 grams protein/86 grams of chicken
= 1435 grams of protein per 4571.4 grams of chicken breast. The rest is fat, etc.
I really doubt you meant 160oz though.
BMJ