Subtotal is not totaling properly

I am creating an online t-shirt order form. I would like people to have the option to purchase different style shirts in multiple t-shirt sizes and quantity, however the total amount due is not showing up correctly. It is only showing the price of one tshirt even though I've selected I want to purchase 2 smalls and 4 mediums. How can I update this?

I have checked your JotForm and see that the quantity field is added from the options which don't work. Please be noted that the Quantity field can be added only once for each product. However, you can enable the Sub-products option for the product so that the quantity will be enabled for each sub-product (Size/color/etc) in the wizard. Please take a look at the following guide that can help you with working on Sub products.

https://www.jotform.com/help/264-Create-Sub-Products-Based-on-a-Product-Option

Please change the options for each product in the form as mentioned in the guide and let us know if you need any further assistance. We will be happy to assist.