Sarah is baking cookies for a bake sale. She needs to prepare 3 batches of chocolate chip cookies and 2 batches of oatmeal cookies. Each batch of chocolate chip cookies requires 2.5 cups of flour, and each batch of oatmeal cookies requires 1.75 cups of flour. How many total cups of flour does Sarah need? Let's think step by step and output the final answer within \boxed{}.
user