Johnny Bakery has two cost functions: TC1(y)= 300 +2y and TC2(y)=50+ 5y. If Johnny produces 50 loafs of bread per day, which method should she use?

a) First

b) Second

c) 25 loafs with TC1 and 25 loafs with TC2.

d) 10 loafs with TC2 and 40 with TC1.