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', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']
[A]: 31945


[Q]: ['6051', '5303', '1509', '2797', 'Z', '4777', '721', '8563', 'K', '63', '9115', 'd', '7305', '9743', '7409']
[A]: 63356


[Q]: ['f', 'b', 'w', '1659', '7797', 'T', 'V', '1943', '1141', '43', '7747', 'K', 'P', 'k']
[A]:
20330