TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 1, 6, ['S', 'i', 'F', 'w', '6345', 'L', '9727', 'u', 'F', '7911', 'K', '3151', '6181', 'N', 'a']

SOLUTION: 6345

PROBLEM: 14, 29, ['1447', 'P', 'X', '5411', '4235', 'K', '6749', '171', '9349', 'K', 'n', '3477', '1183', '9933', '6259', '5793', '1719', 'V', 'C', '1983', '9947', 'I', 'c', '4425', 'Q', 'v', 'a', '3783', '9665', 'z']

SOLUTION: 53507

PROBLEM: 1, 9, ['3083', '3097', 'h', '633', '2243', '5591', 'k', 'N', 'S', '713', '1409']

SOLUTION:
14647