I don't understand this questions and how the answers are figured. if the MU of good A is 30, wouldn't that be divided by the cost of A $2. Resulting in 15? How does this play in? Suppose Mary is in consumer equilibrium. The marginal utility of good A is 30, and the price of good A is $2. a. if the price of good B is $4, the price of good C is $3, the price of good D is $1, and the price of all other goods and services is $5, what is the marginal utility of each goods mary is purchasing? b. If mary has chosen to keep $10 in savings, what is the ratio of MU to P for savings?

Question

I don't understand this questions and how the answers are figured. if the MU of good A is 30, wouldn't that be divided by the cost of A $2. Resulting in 15? How does this play in? Suppose Mary is in consumer equilibrium. The marginal utility of good  A is 30, and the price of good A is $2.  a. if the price of good B is $4, the price of good C is $3, the price of good D is $1, and the price of all other goods and services is $5, what is the marginal utility of each goods mary is purchasing?  b. If mary has chosen to keep $10 in savings, what is the ratio of MU to P for savings?