Packages from the same supplier are grouped into a single purchase order. If the request includes packages from multiple suppliers, one purchase order is created per supplier.

quantity and to_par

Each package entry must provide either quantity or to_par, but not both:

• quantity — the number of units to order. Must be a non-negative number.
• to_par — when true, the quantity is automatically calculated to bring stock up to the configured par level for that package.