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]: ['3051', 'Z', 'q', 'u', 'x', '2747', 'e', 'B', '4225', 'Q', 'R', '4629', 'F']
[EX A]: 14652

[EX Q]: ['W', '8593', '9427', '9931', '8919', 'X', 'B', '8861', '1933', 'Z', 'V', '3427', 'S', '8717', 'd', '1593', '7659', 'Q', 'n']
[EX A]: 69060

[EX Q]: ['k', '4697', '7873', 'a', 'Q', 'e', '1925', '1073', 'V', '4781', '1173', 'f']
[EX A]:
21522