A new supplier sheet says the case is $27.50. The recipe was costed when it was $24. The difficult part is not typing the new price. It is knowing which product the price belongs to, when it became true, and which decisions still depend on the old one.

Keep the source beside the proposed change

Record the supplier, document, date, product description, pack, unit, and quoted amount before updating the current price. A price line without its source is hard to challenge when the invoice disagrees later.

Do not silently apply uncertain text from a scan. Stage what was read, show anything ambiguous as it appeared, and let a person confirm the product and amount.

Compare the same amount of food

Two case prices are comparable only after the pack quantities and units are normalized.

Supplier A: $27.50 for 20 lb = $1.375 per purchased lb
Supplier B: $31.20 for 24 lb = $1.300 per purchased lb

Supplier B has the higher case total but the lower purchased-pound price. The decision may still depend on usable yield, product specification, minimum order, delivery, and whether the kitchen has approved that substitution.

Choose what becomes current

A price list is an offer, not proof that you bought the item at that price. An invoice is evidence of a purchase, but the delivered pack and quantity still have to match the record. Make the update deliberate and keep its effective date.

Let the current price reach recipe cost

Once the selected ingredient price changes, every active recipe using that ingredient should calculate from the same current record. Sub-recipes carry their updated share into parent dishes, and menus carry the dishes into their per-guest cost.

The risk starts when a draft quote still carries the old cost. Current prices should inform its estimate before commitment. For a confirmed event, preserve what was quoted and show the current comparison separately rather than rewriting the historical promise.

Review the affected decisions

After a material price update, check:

  1. Recipes where the ingredient is a large share of cost.
  2. Menus close to the configured food-cost target.
  3. Draft quotes not yet sent or confirmed.
  4. Confirmed events where current cost has moved away from quoted cost.
  5. Purchase choices where another approved supplier pack is now more suitable.

One sourced price should travel through the costing chain. It should not become six manual edits whose dates and origins are impossible to reconstruct.