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]: ['8207', '4791', '3925', 'b', 'Z', '8471', '9215', '3117', 'p', '9095', 'h', 'k', 'E', 'h', '6047']
[EX A]: 52868

[EX Q]: ['P', '6161', 'k', '5925', 'h', 'G', 'n']
[EX A]: 12086

[EX Q]: ['7779', '9809', 'D', 'O', '9743', '3175']
[EX A]:
30506