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.

['2039', '1679', '9675', 'S', 'J', '2069', 'r', 'e']
15462

['q', 't', '4837', 'F', '2367', '1867', '8361', 'm']
17432

['6219', '3083', 'F', 'c', 'U', 'q', 'z', 'Q', '3587', 'P', 'y', 'm', '6813', '3257', '2067', '2987']

28013