DetailSum: the car-detailing calculator that asks what a job leaves per hour

Field notes

The calculator uses three inputs—price, total hours, and direct job costs—and explicitly includes setup and driving in the time total. Its worked example turns a $300 job with $40 in direct costs and five hours into $52 per working hour, while warning that this is not take-home pay or business profit. A $23 Complete purchase adds quote-building, saved browser data, backups, and customer-facing print or PDF output.