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

Answer: 30164


Question: ['u', 'i', 'z', 't', '9617', 'd', '3255', 'w', 'S', '3041', '7451']

Answer: 23364


Question: ['f', '8997', '1417', 'g', '4665', 'w', 'd', '6607', '9027', 't', 'v']

Answer:
30713