In the beach city of Santa Barbara, California, there are seven bathing suit stores, each with the same schedule of costs and each facing an identical demand curve. Swim N Style is a typical store:

                                       Suits sold
                                       (per hour)           Price           Total Cost

                                                1                    $68                  $70

                                                2                      66                    80

                                                3                      64                    85

                                                4                      62                    90

                                                5                      60                  100

                                                6                      58                  115

                                                7                      56                  136

                                                8                      54                  164

                                                9                      52                  200

                                              10                      50                  245

a)   Calculate total revenue, marginal revenue, marginal cost and average cost at each level of sales for the store.

b)   If Swim N Style is a profit maximizer, what number of suits will it sell per hour? What will its price and profit be?