Data for May concerning Dorow Corporation's two major business segments-Fibers and Feedstocks-appear below: Common fixed expenses totaled $345,000 and were allocated as follows: $186,000 to the Fibers business segment and $159,000 to the Feedstocks business segment. What are the Contribution margin for Fibers, contribution margin for feedstocks, segment margin for fibers and feed stock?

Sales revenues, Fibers                                                    990,000

Sales revenues, Feedstocks                                            690,000

Variable expenses, Fibers                                                455,000

Variable expenses, Feedstocks                                        400,000

Traceable fixed expenses, Fibers                                       99,000

Traceable fixed expenses, Feedstocks                             110,000