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]: ['7361', '6913', '3605', '2081', '7619']
[A]: 27579


[Q]: ['4949', '2459', 'n', 'f', 'n', 'v', '8421', '1519', '4859', 'c', '9923', '2829', 'K', '4937', 'W', 'R']
[A]: 39896


[Q]: ['1537', '9333', '757', 'W', 'O', 'X', 'K', 'A', '7791', '3263', '613', 'd', '3999', 'E', '2723', '2983']
[A]:
32999