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]: ['A', '9979', '8723', '1131', 'i', 'p', 'M']
[EX A]: 19833

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

[EX Q]: ['N', '1731', '4955', '5235', '8545', 'v', 's', '565', '7879', '6677', 'G', 'v', 'g', 'p']
[EX A]:
35587