Can u go through steps and write it down do i know how to do it.

So the first dog weighs 27 pounds. That gives you the first number. The second weighs 6 pounds more than the first which means it weighs 33 pounds. 33 is the second number. The last dog weighs 8 more pounds than the first dog which means it weighs 35 pounds. 

So you add:

  27
+33
+35
=95

So your answer is 95 :)