CostMage — sourced cost intelligence

Field notes

CostMage separates official prices, sourced ranges, and derived estimates instead of presenting every figure as a universal answer. Its visible release covers subjects from U.S. residential electricity and propane to passport, visa, exam, stamp, and filing fees. Estimator logic is explicit where available: electricity uses monthly kWh and an official rate, while solar installation uses system size and a sourced dollar-per-watt figure. The site also maintains noindex fee-canary pages for runtime validation.