Usage-Based Billing Calculator
Design a system to calculate the total cost of resource usage across a list of time intervals, given a default price per unit time and an optional price override interval with a different rate.
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Late March, 2026
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Design a system to calculate the total cost of resource usage over time. You are given: A list of usage intervals, where each interval has: start (inclusive) end (exclusive) A default price per unit time An optional price override interval with a different price
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