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]: ['9401', 'w', 'b', '8287', 'n', 'O', 'H', 'h', '45', '2337']
[A]: 20070


[Q]: ['P', '237', 'X', '8893', '7931', 'F', '8359', 'S', '6931', '6953', 'r']
[A]: 39304


[Q]: ['o', 'Y', 'W', 'z', 'q', 'z', 'i', '6011', 'N', '7703']
[A]:
13714