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.

['B', 's']
0

['7973', 'J', '9035', 'H', '4051', '2661', 's', 'z', '8225', 'M', '4153']
36098

['p', '4319', '6957', 'c', 'K', '9077', '1741', 'K', '4231', 'm']

26325