John Deere's bids on tractor components were higher than competitors due to issues with its cost accounting system. The current system allocated fixed costs like engineering and setup costs across all orders equally, regardless of order size. This led to underestimating costs for low-volume orders and overestimating costs for high-volume orders. Switching to an activity-based costing (ABC) system would improve accuracy by allocating costs based on demand each product places on activities. This would allow John Deere to submit more competitive bids and improve profitability by focusing on high-volume orders it has an efficiency advantage in.