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]: ['S', '1249', '6233', 'I', '6733', 'r', 'A', 'E', 'h', 'x', 'p', 'c', '515', '1029', '1593', '1035']
[A]: 18387


[Q]: ['3629', '8785', '9537', '8479', '3523', 'c', 'C', '5093', '2405', 'y', '1145', '8987', 'f']
[A]: 51583


[Q]: ['F', '3289', '8783', 'N', '6811', '5533', 'y', '7787', '3869', 'B', 'Q', 'c']
[A]:
36072