ConsiderthefollowingexcerptfromtheAlcanarticleinAppendix[1]:

The [Alcan] shutdowns surprised many analysts because the company's smelters particularly those in Quebec rank among the world's lowest-cost producers. Alcan generates nearly all its ownhydroelectricpowerinQuebec,allowingittorunolderandlessefficientsmeltersprofitably.

However,Mr.DubucsaidAlcan'sreservoirsforthehydropowerarenowhalftothree-quarters full, and the company has to buy power from Hydro-Qubec just to maintain production.

"Wearestuckwithalackofenergy,"Mr.Dubucsaid."Itdoesnotmakesenseto buyfrom Hydro."

SoAlcan'ssmeltersarelow-costwhentheymaketheirownelectricitybuthigh-costwhenthey have to buy electricity from Hydro-Quebec.

Whatcostconceptsuggeststhatitmightbe wrongtoconcludethatAlcan'sin-housegeneration of electricity gives them low costs? (2pts)