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: 2, 4, ['3155', '581', 'N', '153', 't', '7941', '6065']

SOLUTION: 734

PROBLEM: 3, 7, ['k', 'm', 'W', '641', 'X', 'B', '897']

SOLUTION: 1538

PROBLEM: 20, 20, ['c', '1047', '2461', '2439', '8215', 'r', '7421', '7399', 'b', 'z', '415', '5259', 'h', 'n', 'F', 'F', '1465', 'I', 'N', '5979', '3233', 'T', '1503', '4043']

SOLUTION:
5979