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]: ['Q', '1669']
[A]: 1669


[Q]: ['a', 'q', '4085', '6327', '6869', 'Z', 't', '7057', '1965', 'p', 'o']
[A]: 26303


[Q]: ['y', '9625', 'K', 'L', 'v', 'c', 'A', '567', '269', 'W', '5105', '6945', 'K', 'z', 'a', 'q', 'O', '1775']
[A]:
24286