The City of Richland, Washington issued an invitation to bid for the purchase of one three-phase, three-winding, outdoor, station-type, oil-immersed, load-tap-changing power transformer. The transformer must meet specific material specifications and requirements. The bid includes a base bid and several additives, with different vendors submitting bids for each. The evaluated cost of losses is also considered in the bid evaluation. The contract includes delivery and installation requirements, with specific schedules and timelines.