How did you get to $250 worth of parts? 8GB Pi4 is $75 256GB NVMe M.2 SSD is ~$40 cases with a fan are ~$25 power supply is like $10 but let's say $20 That

How did you get to $250 worth of parts? 8GB Pi4 is $75 256GB NVMe M.2 SSD is ~$40 cases with a fan are ~$25 power supply is like $10 but let's say $20 That brings us to $160 give or take. Where is the extra $90 going? I think $200 is doable with a healthy profit margin.