How to use Velo to allow customers to create their own bundles of store items

Discussion:
Velo

What are you trying to achieve:
I am working with a client who needs his customers to be able to select 3 items from his store and these will then be sold as a bundle for a specific price. For example, “Pick any 3 items and pay $39” He also wants a second option of picking 5 items and paying a specific price. I have no idea how to achieve this but I do know Velo is how I’ll need to proceed.