What is the principal portion of the 188th month’s payment for a $450,000 15/15 hybrid arm mortgage (first 15 years are fixed rate and second 15 years are adjustable – all payments are fully amortizing) with the following parameters:

fixed interest rate: 5.5%
1st year of arm portion - libor index: 1.85%
2nd year of arm portion - libor increase: 1.45%
margin: 275 basis points
annual periodic cap: 2%
lifetime cap: 5%

Russell's is considering purchasing $697,400 of equipment for a four-year project. the equipment falls in the five-year macrs class with annual percentages of .2, .32, .192, .1152, .1152, and .0576 for years 1 to 6, respectively. at the end of the project the equipment can be sold for an estimated $135,000. the required return is 13.2 percent and the tax rate is 23 percent. what is the amount of the aftertax salvage value of the equipment assuming no bonus depreciation is taken