The Stake Division of the Outdoor Lumination Company produces stakes which can be sold to outside customers or transferred to the Solar Light Division of the Outdoor Lumination Company. Last year, the Solar Light Division bought 72,000 stakes from the Stake Division. The following data are available for last year's activities in the Stake Division: Capacity in units Quantity sold to outside customers 425,000 stakes 353,000 stakes Selling price per stake to outside customers $ 4.60 Total variable costs per stake $ 3.70 Fixed operating costs $360,000 In order to sell 72,000 stakes to the Solar Light Division, the Stake Division had to give up sales of 60,000 stakes to outside customers. That is, the Stake Division could sell 413,000 stakes each year to outside customers (rather than only 353,000 stakes as shown above) if it were not making sales to the Solar Light DIVISION. What is the lowest acceptable transfer price from the viewpoint of the selling division?