The City of Pittsburgh,Pennsylvania Is Reviewing Proposals for the Demolition

The city of Pittsburgh,Pennsylvania is reviewing proposals for the demolition of historic,but dilapidated,homes in its "Old East End" neighborhood.The homes,many dating back 150 years,contain lead paint,lead pipes,and asbestos insulation that require special disposal at a special landfill at a cost of $50,000.
The city conducted a life-cycle assessment (LCA) and discovered that the city could reclaim the old woodwork,bricks of the historic homes,and repurpose the materials to use in a new construction project.The Old Crib Deconstruction Company submitted the lowest bid of $450,000 to properly dismantle the old homes.Construction Junction,which specializes in the sale of reclaimed building materials,has offered to purchase the materials for $375,000.
What is the net cost to repurpose the building materials?

A) $75,000
B) $25,000
C) $125,000
D) $375,000