Erica cannot decide whether to buy a packet of potato chips, cheese whirls, or nacho chips, whose marginal utilities are 50, 36, and 42, respectively. The prices of the snacks are $1.25, $0.80, and $1.20, respectively.

Calculate the MU per dollar spent for each of the three products.

i.Chips____________

ii.Cheese whirls____________

iii.Nachos____________

If Erika can afford to buy only one packet, which should she buy?_______________