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', 'G', '217', 'W', 'l', 'j', 'd', 'U', '6795', '1609', 'n', '6919', '617', '5753']

Answer: 21910


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

Answer: 36071


Question: ['1245', '9067', '6685', 'p', '809', '6437', 'M', 'k', '1947', '4671']

Answer:
30861