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]: ['4271', 'N', 'M', '5239', '7037', 'x', 'U', 's', '7107', '4163', 'f', '3607', '6155']
[EX A]: 37579

[EX Q]: ['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']
[EX A]: 28991

[EX Q]: ['4409', '417', '6945', 'V', 'p', '7247', '6433', '7725', 'q', '2225', '1609']
[EX A]:
37010