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]: ['u', 'i', 'z', 't', '9617', 'd', '3255', 'w', 'S', '3041', '7451']
[A]: 23364


[Q]: ['Y', 'X']
[A]: 0


[Q]: ['6265', '8615', 'T', 'o', 'w', 'z', '9359', 'W']
[A]:
24239