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]: ['5233', 'i', 'Z', 'v', '4531', 'j', '61', '1725', '5915', '1677', 'F', 'K', 'M', 'Z']
[EX A]: 19142

[EX Q]: ['L', 'i', '9225', 'w', '5365', '8077', '2733', 'W', '8493', 'B']
[EX A]: 33893

[EX Q]: ['7933', '4203', '6917', '4097', '6899', 'g', 'j', '2719', '3067', '1159', 'n', 'j']
[EX A]:
36994