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.

['5499', '39', 'Q', 'b', 'W', '7155', '2515']
15208

['29', 'N', '5061', '7191', 'z', '8367']
20648

['w', '3287', 'u', 'h', 'B', 'w', 'j', '4965', '167', '1917', 'q', '1069', 'a']

11405