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.

['h', '2295', '2913', 'I', '5273', 'L', '2739', '8227', '6537', 'e', '6491', '5463', 'i', '4337', '537']
44812

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

['X', 'W', 'Z', 'c', 'A', '9621', 'I', 'T', '2565']

12186