How would you assess this assistant’s operating cost and peak capacity?

A fictional assistant completes 50,000 tasks per month. Each model attempt uses exactly 4,000 input and 800 output tokens. Exactly 10% of tasks require one additional identical attempt; all tasks then complete. Fictional rates are $2 per million input tokens and $8 per million output tokens. Retrieval costs $0.003 per attempt, and fixed operating cost is $600 per month. Ignore all other costs for this exercise.

Peak demand is 120 new tasks per minute, with the same 10% retry rate in that minute. The contracted limits are 150 attempts per minute and 600,000 combined input/output tokens per minute. The desired completed-response latency at the 95th percentile is 10 seconds. Limits and rates are exercise assumptions, not vendor claims.