T-SQL Select First Date, Last Date with Amounts

Hello Experts,

I am trying to write a SQL statement which will give me the First and Last dates with the amounts.

I am using the following SQL to get the total first date for the ref and the dates for first and last entry but I need to get the first entry for that ref and the last entry with the first amount and last amount.  I have tried using FIRST and LAST functions but I am not getting the results I want.

SELECT COUNT(DISTINCT ref) AS REF,
              MIN (FIRST_DATE) AS FIRST_DATE,
              MAX(LAST_DATE) AS LAST_DATE,
             SUM(FIRST_AMOUNT) AS FIRST_AMOUNT,
             SUM(LAST_AMOUNT) AS LAST_AMOUNT,
FROM TABLE
GROUP BY REF
Select-First-and-Last-Amount.xlsx