A snаck vendоr аt а spоrts event buys premium trail mix bags fоr $3 each and sells them for $10 during the event. Unsold bags can be sold to a discount channel for $1 each. Each customer turned away costs $1 in goodwill. Booth rental is $200, and last year the vendor earned $1,800 in revenue. Demand is uniformly distributed between 200 and 500 bags. The optimal order quantity is closest to: