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]: ['1203', '6179', '9835']
[A]: 17217


[Q]: ['3895', 's', 'j', '7755', 'H', '7941', '4903', 's', '3629', '1183', '1001', '5569', 'q', '4735']
[A]: 40611


[Q]: ['O', '8687', '5773', 'M', 'G', '3983', 'T', 'k', 'F', 'M', 'w', 'r', 'Q', 'r']
[A]:
18443