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: ['1395', '3605', '6001', 's', 'h', 'T', 'K', 'X', '9413', 'X', '5099', 'c', 'f', 't', 'S', 'f', '4651']

SOLUTION: 30164

PROBLEM: ['3013', '3955', 'f', '1183', '5111', '9509', '2351', '7087', 'f']

SOLUTION: 32209

PROBLEM: ['3227', 'J', 'o']

SOLUTION:
3227