Tenet must install a new $$1\mathrm{.}8$ million computer to track patient records in its multiple service areas. It plans to use the computer for only three years, at which time a brand new system will be acquired that will handle both billing and patient records. The company can obtain a $12$ percent bank loan to buy the computer or it can lease the computer for three years. Assume that the following facts apply to the decision:

The computer falls into the three$-$year class for tax depreciation, so the MACRS allowances are $0\mathrm{.}33,0\mathrm{.}45,0\mathrm{.}15,$ and $0\mathrm{.}07$ in Years $1$ through $4.$

The company's marginal tax rate is $25$ percent.

Tentative lease terms call for payments of $$600,000$ at the end of each year.

The best estimate for the value of the computer after three years of wear and tear is $$400,000.$

What is the NAL of the lease? Format is $xx$,$xxx$.$xx or $($$xx$,$xxx$.$xx$)$

What is the IRR of the lease? Format is x$.$xx$\%$ or $($x$.$xx$)\%$

Should the organization buy or lease the equipment? Format is Buy or Lease