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.

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

[EX Q]: ['2915', '4443', 'Z', '3409', '1417', 'H', 'T', 'u', '3373', 'U', '115', 'R']
[EX A]: 15672

[EX Q]: ['2323', '8663', 'H', '2445', '2043', '3105', '2261', '3573', '4021', 'b', 'c', 'f', 'v', '8743', '6647', '3601', 'S', 'p']
[EX A]:
47425