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: ['6019', '1467', '3415', '7785']

A: 18686
****
Q: ['5899', '229', 'm', '3347', 'k', 'q', 'g', '2755', '8727', '2035', '823', '6835', '9271', 'Q']

A: 39921
****
Q: ['1335', '9527', 'w', 'g', '8641', 'a', '981', 'I', '1261', '4895', '6017', '2795']

A:
35452
****