Nancy wanted to make peanut butter cookies for a family gathering, but her cousin is allergic to peanuts. She decided to make almond butter cookies instead. A jar of almond butter costs three times the amount that a jar of peanut butter does. It takes half a jar to make a batch of cookies. A jar of peanut butter costs $3. How many dollars more does it cost per batch to make almond butter cookies instead of peanut butter cookies? Think carefully first, then make a decision:
A jar of almond butter costs 3 * 3 = $9. It takes half a jar to make a batch of cookies, so it costs 9 / 2 = $4.50 to use almond butter. It costs 3 / 2 = $1.50 to use peanut butter. Thus, it costs 4.50 - 1.50 = $3 more to make a batch of almond butter cookies than peanut butter cookies. So, the answer is 3.