In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.

[Q]: ['57', '9977', '2657', 'p', '9573', '7745', '4755', 'U']
[A]: 34764


[Q]: ['M', '9933', '9861', 'f', 'N', 'R', '7625', 'p', 'T']
[A]: 27419


[Q]: ['9899', 'l', '1951', '3733', 'm', 'i', '5175', 'O', 'J', 'F', '8149', 'r', 'D', '6313', 'd', 'q', 'a', '35']
[A]:
35255