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.

Q: ['1391', '1719', '8547', 'x', 'a', 'j', '6395', 't', '3421', '6607', 'M', '1645', 'H', 'x', 't']

A: 29725
****
Q: ['3839', 'D', '4741', 'L']

A: 8580
****
Q: ['s', '3865', '1199', '7769', '3681', '3123', 'H', 'o', '5433', 'G']

A:
25070
****