Answer:
the numbers are missing, so I looked for a similar question and found the attached image:
Wallula machine
cash flow year 0 = -$30,000
cash flow year 1 = -$1,500
cash flow year 2 = -$1,500
cash flow year 3 = -$1,500
cash flow year 4 = -$1,500
cash flow year 5 = -$1,500
cash flow year 6 = $3,500
the NPV = -$33,710.52
Touchet machine
cash flow year 0 = -$36,000
cash flow year 1 = -$2,000
cash flow year 2 = -$2,000
cash flow year 3 = -$2,000
cash flow year 4 = -$2,000
cash flow year 5 = -$2,000
cash flow year 6 = -$2,000 + ?
NPV must equal -$35,605.91
the present value of the initial outlay and the first 5 cash flows is -$43,581.57
-$35,605.91 = -$43,581.57 - $2,000/1.1⁶ + ?/1.1⁶
-$35,605.91 = -$44,710.52 + ?/1.1⁶
$9,104.61 = ?/1.1⁶
$9,104.61 x /1.1⁶ = ?
? = $16,129.37
the salvage value of Touchet's machine must be $16,129.37 ≈ $16,129