Adding shipping rates based on total number of products ordered?

I am creating a Product Order Form (via Purchase Order) and the shipping rates (which I currently have listed as a product rather than using the Shipping element in Payments which I can't configure to work) need to be based on location (dropdown) as well as the number of units.  Specifically, the minimum order for shipping is 20 units (the equivalent of 1/2 shipping pallet). Is there a way to either:

 - Calculate the total number of units the customer has ordered to at least SHOW the number of units they've ordered?

- Configure the shipping to be based on the number of units?

 - Any other ideas to solve this issue?

Do you mean to say to calculate the total number of products selected to display in the Shipping Quantity field? If so, unfortunately, it is not possible to retrieve/calculate the total number of products since the payment field is read as a single field. So, the total price displayed can only be read in the calculation field. Your requirement seems to be tricky and needs some custom development. You may also try placing separate fields for the products and perform calculations by assigning the calculation values.

If you can let us know the shipping calculation that you want to achieve with an example, we may be able to forward it as a feature request. However, please note that we cannot guarantee that the feature shall be accepted for implementation or cannot provide any ETA.

Thanks!