A local high school held a two-day fundraiser selling lunches. The equations shown represent the amount of money the school collected during the two days.

{
12x + 4y = 152
32x + 12y = 420
12x + 4y = 15232x + 12y = 420

In the equations,
x
x
represents the cost of a chicken lunch and
y
y
represents the cost of a vegetarian lunch. Which is the cost of the vegetarian lunch?