Suppose your classmate Dina loves to eat dessertso much so that she allocates her entire weekly budget to apple crisp and pie. The price of one bowl of apple crisp is $1.00, and the price of a piece of coconut crme pie is $3.00. At her current level of consumption, Dina's marginal rate of substitution (MRS) of apple crisp for pie is 3. In other words, Dina is willing to sacrifice three bowls of apple crisp for one piece of pie per week