9. A trader, who sells watches at the Saturday market, has fixed costs of R80 and buys watches at the whole at R4 each. He sells the watches for R8 each. 9.1 The equation of the TC function is

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same