Discounts on specific products

Hi,

I’m looking for support with applying discounts to sertain types of products. Thanks in advance.

Our shop has courses, exams and books.

We want to apply discounts only to courses.

Let’s say courses are $195 and books are $10. If we apply a percentage discount based on number of items in cart, customers could buy courses cheaper than they should by buying a couple of books.

eg.
1 Session: ￡75
2 Sessions: ￡140 (￡70 each, save ￡10)
3 Sessions: ￡195 (￡65 each, save ￡30)
4 Sessions:?￡240 (￡60 each, save ￡60)
5 Sessions: ￡275 (￡55 each, save ￡100)
6 Sessions: ￡300 (￡50 each, save ￡150)
More than 6 Sessions:? ￡50 each

But adding 2 books to cart would not apply to this bulk discount because they are in different category.

Can I use the premium version to apply the percentage or fixed bulk discount only to one product category?

Bw,
Ben