Worked example · simulated scenario

Keeping Two Milk Purchases Separate

Buying another carton should not erase the history of the one already open. Keeping two records makes it possible to use a little from the older carton without changing the quantity or date of the new purchase.

One carton contains 250 mL of milk and a second contains 1 L. Their label dates differ.

Add the cartons separately

1. Add Milk as a 250 mL batch with the first label date.
2. Add another Milk batch with quantity 1 and unit L and the second date.
3. Record 100 mL Used in cooking against the first batch.

Review each remaining amount

The first batch contains 150 mL and the second remains 1 L.

Compatible volumes can contribute to meal calculations, but consumption still targets the carton selected in inventory. The second carton stays intact until its own record is changed.

Select the package you actually opened when recording use.