I'm trying to use this formula
=SUMIFS(CHILDREN([Reimbursement Amount]:[Reimbursement Amount]), [Reimbursement Date]:[Reimbursement Date], >DATE(2024, 1, 1), [Reimbursement Date]:[Reimbursement Date], <=DATE(2024, 12, 31))
But I keep getting the end message, incorrect argument set. I'm using this as a summary sheet formula. Any ideas?