Sell the box, not the spreadsheet.
A weekly box scheme that behaves like a shop: pick a size, add the extras you actually have in stock, check the postcode for the delivery round, and see the cut-off that decides whether it goes out this week.
Synthetic farm, prices and stock — a working interface, not a live shop. Nothing is submitted or charged.
1 · Choose a box
Seasonal, from the farm's own list. Stock is per week, not infinite.
2 · Add extras
Only what is in the cold store this week; low stock is shown as it is.
3 · Where does it go?
The delivery round depends on the postcode district — not on a dropdown of towns.
What this demonstrates
Stock that is real
A box marked "3 left" is a database count, so the shop cannot sell what the field does not have.
Rounds, not postcodes
Delivery is decided by a routing table of districts, which is how a grower actually plans a van.
A cut-off that ships
The order date is derived from the picking day, not chosen by the customer.