Mrs. Arnold is spending all her money income by buying bottles of soda and bags of pretzels in such amounts that the marginal utility of the last

Mrs. Arnold is spending all her money income by buying bottles of soda and bags of pretzels in such amounts that the marginal utility of the last bottle is 60 utils and the marginal utility of the last bag is 30 utils. The prices of soda and pretzels are $.60 per bottle and $.40 per bag respectively. It can be concluded that