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]: ['5199', 'h', 'T', 'T', 'l', '1661', 'p']
[A]: 6860


[Q]: ['s', '3607', 'p', 'P', '9285', 'J', 'l', '9863', '9823', '2817', 'g', '9751', '599', '2605', 'k', 'Y', 'O', 'U', '9649']
[A]: 57999


[Q]: ['7283', 't', '6743', 'q', 'w', '465', '7289', '5053', '3443', 'p', '941', '837', '2597', 'o', '5353', '81', 'I', 'v', 'j', 'B']
[A]:
40085