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]: ['f', 'F', 'E', '2279', 'r', '6419', 'd', 'M', '3975', '3797', '9201', 'F', 'c', '4753', '959', 'v', '8963', '4007']
[A]: 44353


[Q]: ['B', 'u', '9227', 'b', '8767']
[A]: 17994


[Q]: ['k', '4751', 'K', 'B', 'U', '949', 'i', '7317', 'U', '1265', 'k', '9029', 'x', 'z', '5473', 'D', '4477']
[A]:
33261