Group items for bulk discount

Site URL: https://indigo-hexahedron-khcs.squarespace.com/shop

Hi all, 

I'd like to be able to offer the ability for the customer to make savings if they buy multiple items. There is some cured meats and cheese's priced at £5 each, is it possible to have 3 for £12, which would also work 6 for £24 etc etc.

https://indigo-hexahedron-khcs.squarespace.com/shop

password boscotogo

Thanks,

Kyle

Op was a month ago. Site is gone.