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: ['1305', '1673', 'w']

A: 2978
****
Q: ['5899', '229', 'm', '3347', 'k', 'q', 'g', '2755', '8727', '2035', '823', '6835', '9271', 'Q']

A: 39921
****
Q: ['L', '9243', '2087', 'f', 'A', 't', 'R', 'C', 'W', 'o']

A:
11330
****