Q 8.82: Selkirk Industries produces one product, the "furby-five". The following data refers to this product for one month of operations: Direct material Direct labour Variable manufacturing overhead Fixed manufacturing overhead Per Unit $15.00 7.50 13.50 4.00 Variable selling and admin costs Fixed selling and admin costs 6.25 3.75 Units produced Units sold 100,000 90,000 What are their total period costs under variable costing? A $900,000 B $1,000,000 $1,300,000 D $1,400,000