Brand new to SQL, looking to find total sales on a specific day

I have the following:

SELECT [Sales_Line_Item].[Sales Date], 
       [Sales_Line_Item].[Quantity]*[Sales_Line_Item].[Unit Price] AS [Total Sales]
FROM Sales_Line_Item
WHERE [Sales Date] = #9/1/2020#;

Which displays:

I want to add the total sales together so that the result is:

Sales Date          Total Sales
9/1/2020            $6,276.00

Thank you for any help

I wanted to use SUM(Total Sales) someway but I’m missing an operator

>Solution :

You can do:

SELECT [Sales_Line_Item].[Sales Date], 
       SUM([Sales_Line_Item].[Quantity]*[Sales_Line_Item].[Unit Price]) AS [Total Sales]
FROM Sales_Line_Item
WHERE [Sales Date] = #9/1/2020#
GROUP BY [Sales Date]