Move product quantity from one office to another, the same way as the transfer on the product profile. Office ids are the ones returned by the inventory endpoints. item_type uses the same names as the inventory quantity: unit for unit products, jar or weight_range for the bulk weight of weight products, gram, eighth, quarter, half, ounce for pre-packs and pre_roll for pre-rolls. package_id is required when the product is tracked by packages. Returns the product inventory after the transfer.