How to create a subtotal-based flow in Shopify?

Shopify Plus
1 
In the shopify flow...
I want to create a flow like "If the subtotal before point discount is 20,000 yen or more, add a novelty item."
What condition should I add?
2

I’m not sure what you mean by a “point discount”. Assuming you mean just a “before a discount is applied”, I don’t think the API provides that number, so you cannot use it.

3 
thank you for your reply.
Recognition "before the discount is applied".

For example, is it possible to add up and set conditions such as "subTotalPrice" + "totalDiscountSet"?