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.

['6055', 'v', '9455', 'A', '6817', 'D', '9339', 't', 'K', '1993']
33659

['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']
9530

['4931', 'k', '5173', '7225', '6445', 'Q', '7449', 'n', '4137', 'v', '563', '6661', '7567', 'C', 'r', 'i']

50151