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.

['1875', '9833', 'i', '7493', 'J', 'P', 'z']
19201

['7763', '6003', 'V']
13766

['9039', 'U', 'y', 'T', '9445', 'R', '2763', 'f', '6823', 'l', '5159', '4177', 'q', '9463', 'y']

46869