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]: ['I', 'J', 'K', 'D', '5961']
[A]: 5961


[Q]: ['G', 'o', 'g', 'I', 'S', '9193', 'G', 'C', '2481', '435', 'm', '1005', '5605', '6501', 'D']
[A]: 25220


[Q]: ['q', 'P', '5263', 'E', 'P', 'B', '5867']
[A]:
11130