Add item to cart > click on ‘Item name’, item edit pop-up will show on screen > click on ‘Edit’ button shown below Item Name

Enter new price in the price text field Up shown on screen and finally click on ‘Edit’ symbol 

New window will appear with the price edit option, enter price and click on ‘Done’ if you want to change price temporarily.

If you want to change the price Permanently, then click on ‘Change for future sales’, enter price and click on ‘Done’ option

Click on the ‘SAVE’ button

Changed price will be displayed in the cart.