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]: ['7187', '5651', 'd', '4869', 'q', '2375', '3547']
[EX A]: 23629

[EX Q]: ['k', '1489', 'x', '6543', 'I', 'l', 'D', '6299', '1473', 'a', '7661', 'z', 'E', 'Z', 'U', '3671', '2873', 'e', 'p']
[EX A]: 30009

[EX Q]: ['o', '7801', '2919', 'G', '8889']
[EX A]:
19609