To Sync Inventory and Price 

• Go to Prestashop Admin Panel
• On the left navigation bar, place the cursor on ManoMano Integration and you will see it getting expanded as below:

  

• Click on ManoMano Products and you will be navigated to a page as shown below:

  

• From here, you may select the product(s) and then you need to click on the Bulk Actions button on the bottom left of the page and you may see the options for actions, as shown below:

• Now click on sync Inventory and Price . You may see the success message here as shown in the image below: