Hilern Inc. recorded the following data for the past month: Variable costs per unit: Direct materials $4.00 Direct labour $3.20 Variable manufacturing overhead $1.00 Variable selling expenses $0.40 For the past month, fixed manufacturing overhead was $4,000 and the selling and administrative expense was $3,600. At the beginning of the month, the company had 300 units in inventory. During the month, 2,000 units were produced and 2,100 units were sold at a selling price of $14 per unit. Reguired: (A) Compute the per-unit product cost using absorption costing. [B] What is the operating income [loss] using absorption costing? (C) Compute the per-unit product cost using variable costing. {D} What is the operating income [loss] using variable costing? (E) Discuss the typical reasons why a company would have inventory on-hand. {F} What is a lust-in-Time inventory system? Provide some examples of companies have adopted JIT and discuss possible reasons they would for using this inventory policy system