Can't really give you an exact answer, as men's (and women's) weight vary.
Here is a site that should help you--> http://www.dietbites.com/article1023.html It even gives you ages.
170 lbs.
Men's shake weight wieghs 5 pounds.
115 lbs.
7-9 IBs
Put them on some scales and find out
Too much for two strong men to get up 3 steps. A lot.
1 sixth their original weight
90-115ish
100-155 for women and 100-199 for men
0.8 kilograms for men. 0.6 kilograms for women
about5000lbs
60-70 pounds