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

['q', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']
14871

['I', 'R', 'Z', 'S', 'g', '4649', '9119', '713', '4399', '4239', '8901', '2539', '3717', '4209', 'R', '8805', '2475', 'k']

53765