The Hidden Fence Company sells invisible electric fences to contain dogs within yards. For a half-acre lot, the cost is $2,000 for the system and installation. The market for invisible dog fencing is competitive: Several companies sell similar products at about the same price. In each case, the dog wears a batterypowered collar. The collar gives the dog a shock if it gets near the boundary of the property. Hidden Fence uses a specially designed collar that uses batteries made specifically for Hidden Fence by the Battery-O-Vac Company. The batteries last for 3 months and cost $25 apiece. Hidden Fence has a patent on these batteries, and there is no alternative source of supply. Other fence companies produce products that use generic batteries. Currently, the battery costs of these other systems are the same as for Hidden Fence.The Hidden Fence Company sells invisible electric fences to contain dogs within yards. For a half-acre lot, the cost is $2,000 for the system and installation. The market for invisible dog fencing is competitive: Several companies sell similar products at about the same price. In each case, the dog wears a batterypowered collar. The collar gives the dog a shock if it gets near the boundary of the property. Hidden Fence uses a specially designed collar that uses batteries made specifically for Hidden Fence by the Battery-O-Vac Company. The batteries last for 3 months and cost $25 apiece. Hidden Fence has a patent on these batteries, and there is no alternative source of supply. Other fence companies produce products that use generic batteries. Currently, the battery costs of these other systems are the same as for Hidden Fence. Calculate the present value of the battery, show steps clearly.