Change shopping trip frequency: annual trips, time and costs
Change shopping trip frequency: annual trips, time and costs. Annual cash difference (current − planned); Annual minutes difference (current − planned).
Quantity comparison for ordinary shopping and household errands. Excludes emergency travel, decisions to reduce medically necessary travel, evacuation, safety-required outings, delivery-driver work and commercial logistics routing. No route safety, maps, traffic, optimal route, fuel prices, fuel efficiency or parking fees inferred. No recommendation to reduce trips or detour. Starting values are editable examples. Apply the same currency, distance unit and cost basis to both scenarios; no automatic unit conversion. Time value is a separate reference, not spending. Assume the same distance, time and cash per round trip for both frequencies; annualize weekly by52 or monthly by12. Show current-minus-planned differences including negatives. Fresh food, medical visits, caregiving, necessary outings and storage capacity vary; fewer shopping trips are not judged better.
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Method
Trip difference (original − planned) (Per week (52 weeks/year)) = (Current frequency − Planned frequency) × 52; Trip difference (original − planned) (Per month (12 months/year)) = (Current frequency − Planned frequency) × 12; Annual cash difference (current − planned) = Trip difference (original − planned) × Cash per round trip; Time value reference difference (current − planned) = Annual minutes difference (current − planned) ÷ 60 × Time value/hour (optional, not cash).