Sibrel Inc., a manufacturing company, has provided the following financial data for September:

Sales...................................................$590,000

Variable production expenses............$106,000

Variable selling expense.....................$18,000

Variable administrative expense.........$78,000

Fixed production expense...................$145,000

Fixed selling expense.........................$72,000

Fixed administrative expense.............132,000

The company had no beginning or ending inventories.

Required:

a) Prepare an income statement in good form for September using the traditional approach.

b) Prepare an income statement in good form for September using the contribution approach.