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]: ['y', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']
[EX A]: 27212

[EX Q]: ['Z', '6245', 'N', '1403', 'b']
[EX A]: 7648

[EX Q]: ['Y', 'k', '9379', 'd', '1939', '8523', '937', 'j', 'u', 'R', 'M', '7071', 'G', '5931', '1537', '1635']
[EX A]:
36952