“Grouped” Product or do I need “Product Bundles” to achieve what I want?

Hi, this is just Day 2 of using WooCommerce for me so a basic question.

I am creating a site selling digital downloads which I want to “bundle” together in such a way so that the buyer can select A, B or C individually or in combination (eg: A + B or A + C) OR and this is where I am sticking all three together but for a more economical price than simple a tally of the individual prices of A, B and C. So effectively, D, which is A,B and C combined but, as I said, for a more economical price.

Have been experimenting with “Grouped Product” but I don’t think I can achieve what I have described above via “Grouped Product”. Please can someone confirm, if this is the case? If so, would the extension “Product Bundles” be the way forward? Or is there another alternative?

Many thanks in anticipation.
Sally