Giant Food Stores location in Camp Hill, PA received proposals from 3 bidders to resurface its roof. The proposal includes installation of a new roof membrane followed by 3 years of follow-up coating and treatment. The coating materials and labor vary greatly so a total costs of ownership (TCO) was calculated for each: Bidder A = $815K. Bidder B= $1.1 million. Bidder C = $920k. Before a bidder was chosen, Bidder B notified the buyer that it discovered a new way for installation and could reduce install costs by $300k. Giant Foods chose the bidder with the lowest TCO which was________. (Use 3% as the borrowing rate in your calculations.)