I am setting up a wholesale website. I need to be able to sell products in multiples.
We sell pin badges at 48p each.
They are sold in multiples of 100.
I need to be able to only offer the customer options to buy 100/ 200/ 300 ........ etc
Did you try to set a new Variant on your product?
I´ve made a test on a product and set a variant called "Multiple" and set the value at 100 and then set the price.
I don´t know if it works but it´s an ideia that i hope it helps you.