I sell products in packages, how to show price per unit?

I sell products in packages of 50, 60, 70, 80 units, and the price per unit decreases as the quantity increases. Is there a way to configure this on the product page? Currently, I only see options to set a base price based on weight, length, or volume.

If it’s not possible through the standard settings, could this be implemented with custom code?

Thanks!

You don’t need custom code,

You can use the Variations section.

How can I do it? Because the unit option doesn’t appear, I can only set a price for g, m2, or volum.

I sell printed design for weddings, so if they buy 50 the price per unit is 4€ but if they buy 200 the price per unit is 3€, how can I do that? Thanks!!!