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]: ['Y', '8169', '9067']
[A]: 17236


[Q]: ['4463', '489']
[A]: 4952


[Q]: ['R', 'J', 'z', 'o', '1121', '7247', '8987', 'u']
[A]:
17355