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.

['8109', '6811', 'f', 'l', '5869', 'm', '4657', 'y', 'P', '7983', 'o', 's', 'i', 'm', '2141', '4497']
40067

['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']
40860

['Z', 'l', 'f', 'Y', '5987', '5291', 'X', 'A', 'd', '9287', '5847', '3413', 'I', 'M', 'A', 'u', '7849', '4941']

42615