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]: ['z', 'j', 'M', 'E', '1689', '8413', '2603', 'b', '5101', 'w', 'r']
[A]: 17806


[Q]: ['5331', 'f', '2865', '6019', 'U', 'm', 'g', 'n', 'Y', 'A']
[A]: 14215


[Q]: ['H', 'n', 'y', '7311', '4439', 'e', '6271', '3705']
[A]:
21726