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.

['135', 'a', 'X', '8067', '8447', '4009', '4221', 'o', 'A', 'x']
24879

['8361', '6757', '5341', '2597', '9803', 'a', 'd', '5889', '9823', 'd', '7947', 'y', 'p']
56518

['u', 'M', 'v', 'I', '4333', '5867', '1909', '8455', '3143', '5547', '3725', 'U', '171', '7475', 'I', 'v', 'B', 'a', '5397']

46022