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]: ['D', '1693', 'f', 'B', 'o', '3947', '8667', 'f', '6721', '4191', '79']
[A]: 25298


[Q]: ['v', '9511', 'f', 'q']
[A]: 9511


[Q]: ['F', '9285', 'c', '277', 'R']
[A]:
9562