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.

Q: ['T', '721', '6555', 'g', 'y', 'U', '3053', 'A', '9663']

A: 19992
****
Q: ['8109', '6811', 'f', 'l', '5869', 'm', '4657', 'y', 'P', '7983', 'o', 's', 'i', 'm', '2141', '4497']

A: 40067
****
Q: ['P', 'L', '2655', '6419', 'H', 'E', '829', 'y', 'U', '5639', '4867', 'T']

A:
20409
****