Company QRS is evaluating the purchase of new equipment to replace existing machinery. The new equipment has a purchase price of $500,000 and is expected to have a useful life of 10 years with no salvage value. The existing machinery has a carrying amount of $200,000 and a remaining useful life of 5 years. Analyze and compare the total costs of owning and operating both the new equipment and the existing machinery over the next five years, recommending the most cost-effective option for the company, providing detailed reasoning.