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.

['T', '8333', 'C', 'Z', 'n', '1419', 'd', '3205', 'D', '1187', 'd']
14144

['j', '6731', 'h', 'G', 'F', '6899', '4317', 'm', '9491', 'l', '971']
28409

['T', 'J', 'c', '9393', 'F', 'n', 'm', '3823', 't', 'r', '1651', '7983', 'U']

22850