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]: ['6669', 'n', 't', 'N', 'x', '8153', 'W', 'v', 'B', '3181', 'y', 'e', '3491']
[EX A]: 21494

[EX Q]: ['5331', 'f', '2865', '6019', 'U', 'm', 'g', 'n', 'Y', 'A']
[EX A]: 14215

[EX Q]: ['Q', '5667', 'P', '439', 'G', '6005', '3957', 'f', 'D', '6571', 'U', 'M', '2337', '1077']
[EX A]:
26053