united research associates (ura) had received a contract to produce two units of a new cruise missile guidance control. the first unit took 5,000 hours to complete and cost $40,000 in materials and equipment usage. the second took 4,750 hours and cost $34,000 in materials and equipment usage. labor cost is charged at $25 per hour. the prime contractor has now approached ura and asked to submit a bid for the cost of producing another 20 guidance controls.