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: ['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']

A: 28991
****
Q: ['A', 'S', 'c', 'I', 'M', 'P', '8739', '879', '1401', '3941', '4061', 'q', 'P', '2805', '4473']

A: 26299
****
Q: ['W', '5993', 'A', 'A']

A:
5993
****