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.

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

[EX Q]: ['3331', '5791', 'r', 'Q', '2243', '8229']
[EX A]: 19594

[EX Q]: ['F', 'f', '5867', 'Z', '841', 'P', '1727', '9029', '993', 'k', '4233']
[EX A]:
22690