There are two models in the market: Model T costs $200,000, and you need two units of model T for your project. Maintaining cost for each unit would be $40,000 per year. Each freezer can be used for three years. At the end of which time, you forecast that the salvage value will be $60,000 for both freezers. Model Q costs $240,000 each. The maintaining costs of this model is $25,000 per year. The salvage value of both model Q at the end of ten years is $60,000. Once again, two units of model Q is required for your project. Since you aim to complete your project in two years, you estimated that, the model T could be sold for $50,000 each and the model Q for $100,000 each after two years.

Compute the present cost difference between two models using MARR value of 20%