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


[Q]: ['R', 'k', '3355', 'Y', '6635', 'M', '4839', 'T', 'd', '495', 'g', 'E', 'g', 'F', 'S', '5377', 'g']
[A]: 20701


[Q]: ['2411', 'Q', '793', '5915', '6875', 'F', 'K', '6329', 'l', 'w', '189', '8785', '7087', 'V', '7249', '7921']
[A]:
53554