In: Economics
Solution :-
Initial Cost = $25,000
Therefore at year 0 Cash Outflow = $25,000
Now from year 4 Inflow = $7,500
But from Year 7 Inflow Reduced by $300
Therefore net inflow = $7500 - $300 = $7200
After year 9 Machine Useless
So assume salvage value at the end of year 9
Cash flow at year 9 = $6,600 + $31,000 = $37,600
Here i take assumption that salvage money received at the end of year 9
If there is any doubt please ask in comments