There are a number of reasons - we try and offer a roughly similar amount of meals at a roughly similar price. Manufacturing, packing, shipping costs among others dictate the best and most affordable price we can offer to our customers while still keeping a sustainable business (it would be no good offering Huel for half price if we couldn’t remain active as a company)!
We would have to completely overhaul the way our products are set up and priced if we wanted to enable ordering 1x unit of each, and that adds a further layer of complication relating to communicating possible shipping fees and charges, and how we best enable customers to mix and match. It is something that our Hueligans are bringing up more and more but it’s not a simple flick of a switch - otherwise we’d already have done it!