Exerclse $14-28($Algo$)$ Compute ROI $($LO $14-2)$

Lauderdale Corporation is organized in three geographical divisions $($reglons$)$ with managers responsible for revenues, costs, and assets in their respective regions. The firm is highly decentralized and managers are evaluated solely on divisional performance. Corporate overhead $($all fixed$)$ is allocated to the reglons based on regional gross margin $($reglonal revenue minus reglonal cost of sales$).$

The following information is from Lauderdale's first year of operations:

$\backslash$table$[[,$Region I,Region II$,$Region III,$\backslash$table$[[$Total$],[$Corporation$]]],[$Revenues$,$$$1,211,009,$$$1,661,000,$$$2,261,009,$$$5,133,600$