A shirt company spends $1000 per week on rent for its factory. Each shirt made at the factory requires $2 worth of cloth and $6 worth of labour and energy. If the factory produces 2000 shirts per week,
a) What is the average cost of the shirt?
b) What is the marginal cost of the shirt?
If the factory produces 3000 shirts per week,
a) What is the average cost of the shirt?
b) What is the marginal cost of the shirt?