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]: ['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']
[A]: 69093


[Q]: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']
[A]: 36604


[Q]: ['3693', '103', '9625', 'I', '1937', 'S', '6511', '339', 'r', '823', '2111', 'Y', 'B', 'X', '2031', '499', '1967', 'I', 'C']
[A]:
29639