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.

['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']
33713

['b', '5689', '119', 'p', 'P', 'J', 'w', 'm', '7397', 'Y', '447', 'O', 'p', '319', 'H', 'U']
13971

['4505', 'S', '5673', 'd', 'f', '685', 'h', 'C', 'x', 'W', '8371', '7013']

26247