A weekly stock record should explain a change in quantity, not predict demand from an assumed type of customer. Use a separate entry for each exact N2O product. Record the product name, stated amount and package reference consistently so similar names are not combined by accident.
Begin with the opening count and its date. State the unit being counted: individual items and outer packages are not interchangeable units. Where a package contains multiple items, record that relationship explicitly. A total without a defined unit cannot be compared reliably with the following week's count.
Add documented receipts separately. Connect each receipt to its product reference, quantity and supporting record. If an item has not yet been received, keep it out of the physical count. A request, a confirmation and an item on hand describe different states and should not be collapsed into one number.
Record movements and corrections with a reason and date. Do not erase the original entry simply to make a total agree. A correction should show what was changed and why. Keep entries for different capacities separate unless the purpose of a combined figure is clearly explained.
Compare the closing count with the recorded movements. Mark any discrepancy as unresolved until it has been checked. Do not estimate cylinder contents from appearance or treat a package count as a measurement of remaining gas. Follow manufacturer documentation for product-specific questions instead of inventing a measurement procedure.
Close the week with the person who checked the record and any outstanding follow-up. Keep stock documentation distinct from storage and handling requirements, which remain governed by the exact product's manufacturer information. Products must remain within their labelled intended purpose and must not be inhaled.
