Hi everyone,

Can someone please help me with my problem,

I really need to solve this...

I have a table Sales....

Product | Brand | Sales | Price_1| Price_2 | Price_3
---------------------------------------------------------
Milk | Alaska | 0 | 10 | 20 | 30
Milk | Alaska | 1 | 80 | 70 | 90
Milk | Alaska | 2 | 100 |...