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]: ['6217', 'A', '1925', 'o', '1433']
[A]: 9575


[Q]: ['3831', 'd', 'C', '1073', '1355']
[A]:
6259