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]: ['D', '7807', '9395', 'T', 'c', '5139', '2827', 't', 'T', 'm', '3717', 'U', '3225', '7419', '2481', 'p', 'C', '5277']
[A]: 47287


[Q]: ['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']
[A]: 3566


[Q]: ['433', 'j']
[A]:
433