The table below represents the hourly output and cost structure for a local pizza shop. The market is perfectly?competitive, and the market price of a pizza in the area is ?$8. Total costs include all implicit opportunity costs. Calculate the pizza?shop's marginal cost and marginal revenue at each rate of output and fill in the values in the table.

Not sure if I'm calculating this correctly for marginal revenue or marginal cost.

Total Hourly Output Total Hourly Total Total Economic Marginal Marginal and Sales of Pizzas Cost ($) Revenue (S) Profit ($) Cost (S) Revenue ($) 6 10 8 - 2 4 12 16 4 2 13 24 11 15 32 17 N 19 40 N 4 25 48 23 33 56 23 Ca 43 64 N 10 55 72 17 12 10 71 80 LO 16