Price and inventory does not change.

Price and inventory of "Approval Completed" products cannot be changed using [Product Modification API].

Please refer to below list and use the corresponding API to make your changes.

• originalPrice (base price for discount rate): [API to change product item level discount rate's base price]
• salePrice (selling price): [API to change product item level price]
• maximumBuyCount (quantity available for sales-inventory):  [API to change product item level quantity]