the burger details:
180-pound ground beef patty
its bun weighs 100 pounds.
Mallie's uses 20 pounds off American cheese,
15 pounds of tomatoes,
15 pounds of onions,
10 pounds of pickles,
10 pounds of bacon 
and 10 pounds of lettuce.
question:
I can't believe you lose so much of the hamburger when it I cooked. In this, case the burger started out weighing 170 pounds and ended up weighing 180 pounds after cooking. I have consumed burgers that weighed one pound before cooking. Assuming the weight of the original beef, beef that becomes grease and final burger weight are proportional what part of the original one pound burger should remain after cooking?