46. An engineering freshman wants to purchase a laptop computer for use during the 4 X years that she plans to study engineering at Texas Tech (Now that's good planning!). After looking around a bit, she finds that a well-equipped laptop with software can be purchased for $1,800 and that it should have a market value of at least #300 if she wants to sell it when she graduated after 4 15 years. Assume that maintenance and supplies will cost $100 each six months. Use an interest rate of.12% with monthly compounding, and determine the present cost of owning and operating the computer