Phoebe, a personal trainer, is preparing several blends of varying juice concentrations to see which ratio her fitness club's clients prefer. She plans to make 240 oz each 80% juice, 60% juice, 50% juice, 40% juice, and 20% juice blends. If the 100% juice Phoebe plans to buy comes in 32 oz bottles and partial bottles cannot be bought, how may bottles will Phoebe need to make her blends?