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.
--------
Question: ['T', '721', '6555', 'g', 'y', 'U', '3053', 'A', '9663']

Answer: 19992


Question: ['8665', '6083', '9819', 'H', 'p', 'S', 'R', '4311', 'R', '7193']

Answer: 36071


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

Answer:
30164