The snack bar at the school purchased water bottles at wholesale and then marks them up to make a profit. it marks up the water bottles by 33 percent, an amount of $0.28. what was the wholesale price of each water bottle?

Hi there
Say that the price at the whole for a bottle is some x
We know that the Snack Bar sold them at 33% profit which is in dollars $0.28
i.e 33% x=0.28
so now its a matter of finding what x is 
writing this in algebraic form
0.33x=0.28
divide both sides of the equation by 0.33
0.33x/0.33=0.28/0.33
Therefore x=0.85 roughly
so the price per bottle at the whole sell is 85 cent
the snack bar is selling it for 1.13 dollars
assuming no tax applied