The Number of Users That Are Eligible for Discount

None

Example Testcases:

{"headers": {"Purchases": ["user_id", "time_stamp", "amount"]}, "startDate": "2022-03-08", "endDate": "2022-03-20", "minAmount": 1000, "rows": {"Purchases": [[1, "2022-04-20 09:03:00", 4416], [2, "2022-03-19 19:24:02", 678], [3, "2022-03-18 12:03:09", 4523], [3, "2022-03-30 09:43:42", 626]]}}