The Red River Division of Wet Clay Company produces and sells bags of pottery clay which can either be sold to outside customers or transferred to the White Mountain Division of Wet Clay Company. The following data are available for the last year: Red River Division: Production capacity - 18,000 bags Selling price per bag to outside customers - $20 per bag Variable production cost per bag - $10 Variable selling cost per bag - $4 White Mountain Division: Number of bags needed annually - 6,000 bags Price per bag paid to an outside supplier - $16 per bag By selling to the White Mountain Division, the Red River Division will avoid $3 per bag in selling costs. If Red River can sell only 10,000 bags annually to outside customers, what is the lowest acceptable transfer price per bag from the viewpoint of the selling division? 12 Oo oo