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]: ['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']
[EX A]: 45451

[EX Q]: ['I', '7815']
[EX A]: 7815

[EX Q]: ['1153', '2543', '7237', 'B', '8425', '6245', 't', 'o', 'F', 'h', '2637', 'w', '623', 'Q', 'J', '6151', 'Y', 'K', '9247']
[EX A]:
44261