Show a sub total in each product item in the form

Hi Sir

                  I want to add a box for every product which will give total price charged for product (Quantity x price) .I attached screenshot of my form .Please reply as soon as possible.

Thanks

I think you would like to have a sub-total in each item. For example https://form.jotform.com/60295118641959. Is this correct? If so, you need to use the dropdown quantity property:

...then make sure to enable the special pricing:

In the last settings, you can show item subtotal in the form: