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]: ['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']
[EX A]: 33416

[EX Q]: ['A', '9775', '5867', 'n', '1329', '5973']
[EX A]: 22944

[EX Q]: ['4125', 'J', '947', 'p', '9793', 'i', '883', '1147', '7377']
[EX A]:
24272