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: 4, 14, ['99', 'F', '1297', '7085', 'u', 'w', 'w', '3803', 'F', 'D', 'F', 'L', '5967', '3545', 'E']

SOLUTION: 20400

PROBLEM: 14, 18, ['4235', 'd', '7915', '2595', '1123', '475', '7987', '287', '4659', '45', '737', 'l', 'Z', '5245', '8021', 'g', 'D', '9801', '2327', '339']

SOLUTION: 23067

PROBLEM: 11, 16, ['2885', '117', '8091', '9303', 'B', '191', 'i', 'B', 'R', 'h', 't', '5417', 'D', 'M', 'f', '163', '535', 'd', 'n', '5195']

SOLUTION:
5580