TASK DEFINITION: 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.
PROBLEM: ['7763', '6003', 'V']

SOLUTION: 13766

PROBLEM: ['e', '6633', '131', '7459', '3733']

SOLUTION: 17956

PROBLEM: ['Q', '8557', '1393', '4401', '4963', 't', '5521', 'n', 'd', '7499', '383', '1035', '7553', '9017', 'B']

SOLUTION:
50322