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]: ['8871', '1297', 'W', 'f', 'Y', '8731', '113', '6707', '379', '9631', 'X', 'C', 'q']
[A]: 35729


[Q]: ['7763', '6003', 'V']
[A]: 13766


[Q]: ['B', '8829', '4169', 'a', '887', '4983', '15', '3653', 'e']
[A]:
22536