PayPal Integration: Total amount is not being updated when selecting a product.

I cloned your form and was able to replicate your issue, however, I removed the integration and added it again, I added some testing products as well and it worked. Could you please try doing this? 

Here is my cloned form, I deleted all the fields as well as the products, the new ones are affecting the total amount: https://form.jotform.com/60737330890962. 

and how to brink sub label like this under the drop down . Thankyou

You only need to add them as options. 

The sub-labels will be automatically under the drop down as you are using a template/custom design. 

But if it does not, you may inject this CSS code to your form: 

.form-product-item .form-sub-label {

        display: block;

    }

This guide will help you to inject the code: http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes. 

ok so now i deleted and make it again but again total amount is not upgrading. 

its solved THANKOU :)

Great to know it is working now, you're welcome. Cheers!