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.

['C', '3133', '2183', '5793', '9305', 'd', 'g', '6501']
26915

['5233', 'i', 'Z', 'v', '4531', 'j', '61', '1725', '5915', '1677', 'F', 'K', 'M', 'Z']
19142

['5299', '659', '4187', 'a', '8291', 'J', '7091', 'l', 'i', 'J', 'k', 't', 'M', 'k', 'A', '4099', '9149', '7205', 'm']
45980