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.

['8743', 'Y', 'O', '8265', '1029', '5689', 'F', 'j', 'Z', 'i', 'S', '1285', '737']
25748

['4389', '8535', 'D', '6063', 'z', 'r', 'w', '5725', '291', 'a', '9059', '569', '2943', 'W']
37574

['z', '3887', 'E', 'T', 'Y', 'z', '2991', 'R', '6719', 'Q', '8569', '9853', 'Y', 'm', '2515', 'x', 'm', 'h']

34534