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: 3, 7, ['1687', '1929', '3189', '3277', 'L', 'b', 'x', '3181', 'C', 'w', 'A', 't', 'I', '3421']

SOLUTION: 6466

PROBLEM: 1, 2, ['8895', 't', '5739']

SOLUTION: 8895

PROBLEM: 13, 17, ['l', '6171', 'R', 'H', '3493', '715', '5', 'D', 'B', 'E', '2351', '7603', '4255', '7025', 'c', 'k', 'h']

SOLUTION:
11280