Compare the economics of how a business charges today, by the hour or by the day, with fixed packages for the same work. Takes the cost base, the current rate and unit, the share of hours worked that reach an invoice, one to three packages with price and typical effort, and jobs per month. The current rate always comes from the user and is never assumed. Returns, at several efficiency gains (default 0, 15 and 30 percent less effort as delivery gets repeatable), revenue and profit per job and per month under each model, earnings per hour worked, revenue ceilings at full capacity, the package price that matches what each job collects today, and plain findings. Deterministic arithmetic with the method explained.