I do not understand this at all someone told me that this is pre calculus but I am in algebra 2

3. Michael builds tool sheds. He uses 10 sheets of dry wall and 15 studs for a small shed and 15 sheets of dry wall and 45 studs for a large shed. He has available 60 sheets of dry wall and 135 studs. If Michael makes $390 profit on a small shed and $520 on a large shed, how many of each type of building should Michael build to maximize his profit? Optimization Equation: Variables: Inequalities: F (x, y ) F (x , y) (x, y