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, 15, ['l', '5597', 'M', 'l', '6065', '7949', 'e', '433', '8159', 'N', 'Z', '5597', 's', 'k', '6973', '8387', 'n', 'W', '9895']

SOLUTION: 40773

PROBLEM: 20, 26, ['8183', 'I', 'o', 'B', '7567', '4953', '8133', '2883', 'g', 'D', '865', 'a', 'y', 'Z', 'F', '3211', 'e', 'X', '5135', '7257', 'G', '1577', '7977', 'X', 'z', 'e']

SOLUTION: 16811

PROBLEM: 2, 16, ['B', 'n', '3303', 'd', 'i', '2849', 'c', '7903', '1949', 'f', '5979', '2997', '2511', '6995', '9655', '813', '1097', '3205']

SOLUTION:
44954