Abby derives more utility from spending an additional dollar on shoes than on hats. We can assume that: Group of answer choices the marginal utility per dollar spent on shoes is greater than the marginal utility per dollar spent on hats. the marginal utility per dollar spent on shoes is equal to the marginal utility per dollar spent on hats. the marginal utility per dollar spent on shoes is less than the marginal utility per dollar spent on hats. shoes cost less than hats