Colise Services is a repair-service company specializing in small household jobs. Each client pays a fixed monthly service fee based on the number of rooms in the house. Records are kept on the time and material costs used for each repair. The following profitability data apply to five customers. Compute the operating income for each of the four customers. Customer Customer Operating Income

Revenues Costs by Customer Marveline Burnett $460 $270 ? J Jackson 340 366 ? Paul Saas 90 132 ? Becky Stephan 520 264 ?