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]: ['x', '5259', 'T', 'L', 'C', 'H', '2493', 'u', '3851', '2439', 'U']
[A]: 14042


[Q]: ['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']
[A]: 10061


[Q]: ['m', 'i', '9467', 'F', 'E', 'b', 'm', 'b', 'a', 'x', 'x', '6293', '7219', 'D']
[A]:
22979