Estimate savings from grocery pickup vs delivery fees.
Free pickup and paid delivery buy the same groceries, so the difference between them is simply the fee plus the tip on every order. Multiplying by order frequency turns a small per-order charge into a visible annual figure, and expressing it as a share of grocery spend shows whether convenience is costing a rounding error or a meaningful slice of the food budget.
Delivery premium
Monthly premium = (delivery fee + tip) x orders per month; share of grocery spend = monthly premium / (average order x orders) x 100
Usually of fees, but not of time and fuel. If collecting adds a dedicated trip, count that fuel before treating the premium here as pure saving.
They replace per-order fees with a flat cost. Divide the subscription price by your monthly orders and compare it against the extra-per-order figure shown here.
Often yes — ordering from a list avoids in-store prompts. If your basket is measurably smaller online, that offset belongs in the comparison too.