Joomla 3.9 + Virtuemart 3.4.2
How to set the price of the product to be dependent on the amount of products ordered by the customer?
The more products the customer purchases, the lower the price per product will be.
...
or there are plugins e.g. http://bfy.tw/Kdh3
Is there any documentation or video for this plugin?
Or use the Quantity range values with additional prices on each product information page