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]: ['2625', '1611', 'E', '4507', '3013', '1569', 'M', '2607', '1111', 'W']
[EX A]: 17043

[EX Q]: ['A', 'S', 'c', 'I', 'M', 'P', '8739', '879', '1401', '3941', '4061', 'q', 'P', '2805', '4473']
[EX A]: 26299

[EX Q]: ['O', 'W', '6731', '5387', '3153', 'X']
[EX A]:
15271