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.

['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']
19001

['o', 'a', 'K', '6031']
6031

['4763', '4647', 'p', '4269', 'r', '8307', '63', 'A', 'D', '9217']

31266