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]: ['6565', 'T', 'O', '2901', '5121', 'y', '9617', 't', '7825']
[A]: 32029


[Q]: ['q', 'U', 'I', '5245', 'g', 'Y', 's', 'V', 'b', 'V', 'D', '1193', 'p']
[A]: 6438


[Q]: ['8121', '13', 'a', 'S', 'k', 'W', '1947', '261', 'C', 'q', 's']
[A]:
10342