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.

['2417', '6671']
9088

['J', 'm', '1255', 'S']
1255

['G', 'F', 'b', '2621', '4079', '1933', 'G', '9003', 'Z', 'b', '5419']

23055