fix: the amount here is actually the revenue sum

src/main/sql/answers.sql

@@ -148,9 +148,7 @@ WHERE Products.color = 'red'
   AND Sales.date = '2024-02-14';
 
 -- Question 1 part 2 c)
--- One sID can have multiple products
--- We need the DISTINCT keyword
-SELECT COUNT(DISTINCT sID)
+SELECT SUM(Sales.amount)
 FROM Sales
 WHERE Sales.date = '2024-02-14';