After entering the neccesary data for stone, click on update and the editor of stone is opened.
In the editor a user needs to fill Price Type, Tax field, Quantity, Unit Price, Discount, Reference Number, Description. Quantity can be in pc or ct based on the item selected.
If the tax is selected from its drop down it will calculate the amount to be paid by the user. If a item has a discount its amount is calculated in the final paid amount.
The selling price is automatically calculated based on Unit Price and its discount.