Hi, i have this matlab code and was wondering if anyone could help me sort it out.

I want the formulas to calculate the NPV for each year, then to sum it. But instead the profit is calculated for year 4 only.

year=zeros(1,5)

year=[0 1 2 3 4]

tonne=145000

if year<=0

InitialInvestment=-9000000

end

if year>0

FixedOperatinCosts=-1800000

end

VariableOperatingCosts=-55*tonne

Revenue=95*tonne

Shutdowncost=-4500000

In=Revenue

if year <= 0

out=InitialInvestment

elseif 4>=year>0

Out=VariableOperatingCosts+FixedOperatinCosts

else year=4

Out=Shutdowncost+VariableOperatingCosts+FixedOpera tinCosts

end

end

Profit=zeros(1,5)

Profit=In+Out

NPV=Profit./((1.12).^year)

NPV1=sum(NPV)

Rem