https://www.reddit.com/r/theydidthemath/ might get you a ballpark exposure estimate.
-Old microwave. Probably coated internally with spaghetti sauce and grease so it was not operating at peak.
-The amazing multifunction skin organ covering us all. Blood flow circulating.
-Expendable fat cells quickly consumed by macrophages. Easy way to lose weight eh?
-Might be less than a burnt sunbather.