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]: ['s', '3881', 'l', '5271', '9227', 'Z', '5429', '7691', '6127', '6301', '8533', 'T', '233', 'j', '1685', 'F', 'b', '3797', '6633', '7917']
[EX A]: 72725

[EX Q]: ['2895', '8095', 'y', '1927', '4827']
[EX A]: 17744

[EX Q]: ['Q', 'C', '2595', '2791', '1449', '8829', 'r', '6963', '991', '8779', 'R']
[EX A]:
32397