Given: $8\%$ annual discount rate, tax rate of $21\%.$

You sell machines. Your machine sells for $$500$K$,$ lasts $5$y$,$ has no salvage value, and will increase your customer's pre$-$tax revenue by $$150$K each year for the $5$ years it operates.

$($So gross revenue might go from, say, $$1$M$,$ $$1$M$,$ $$1$M$,$ $$1$M$,$ $$1$M$...$ to $$1\mathrm{.}15$M$,$ $$1\mathrm{.}15$M$,$ $$1\mathrm{.}15$M$,$ $$1\mathrm{.}15$M$,$ $$1\mathrm{.}15$M$...).$

Current tax law calls for $5$y straight$-$line depreciation of your machine.

A lobbyist offers you a guaranteed deal...they will successfully lobby the legislature and change the tax code to allow $2-$year straight$-$line depreciation. This will make your machine more valuable.

How much more valuable is your machine in a $2$y depreciation environment, compared to the $5$y environment?