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

['2683', '4431']
7114

['5741', 'j', '5119', 'C', '4605', 'i', '5013', 'b', '2287', 'z', 'Z', '7051', 'W']

29816