Beckett is 12 and is three years younger than Olaf, while Shannen is two years younger than Olaf.  If Jack is five more than twice as old as Shannen, what is the sum of the ages of all 4 people?
How old is Olaf? ** Olaf is 12 years + 3 years = <<12+3=15>>15 years old.
How old is Shannen? ** Shannen is 15 years old - 2 years = <<15-2=13>>13 years old.
How old is Jack? ** Jack is 5 years + (2 * 13 years) = <<5+(2*13)=31>>31 years old.
What is the sum of the ages of all 4 people? ** The sum of all of their ages is 12 + 15 + 13 + 31 = <<12+15+13+31=71>>71 years old.
#### 71