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.

[Q]: ['3497', '761', '6157', 'J', 'n', '139', '9895', '2939', 'K', 'I', '2161', 'c', 'a', '485', '7959', 'i', '4753', '3305', 'G', '3475']
[A]: 45526


[Q]: ['s', '3881', 'l', '5271', '9227', 'Z', '5429', '7691', '6127', '6301', '8533', 'T', '233', 'j', '1685', 'F', 'b', '3797', '6633', '7917']
[A]: 72725


[Q]: ['V', '3081', 'H', '8363', '581', '3667', 'l', '8173', 'T', 'w', '9943', '1791', 'G', '8869', '6081']
[A]:
50549