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]: ['7411', 'Y', 'x', 'l', '4119', '7241']
[EX A]: 18771

[EX Q]: ['3655', '1349', '6519', '1019', 'v', '4811', '8609', '9147', '8225', '2665', '2627', '5839']
[EX A]: 54465

[EX Q]: ['I', '5109', 'M', '573', '2687', 'w', 'i', '599', 'M', '2339', 'g']
[EX A]:
11307