Purchasing Options for a multi day group class

I am looking to run a, numbers limited, class on multiple (10) sequential saturdays at a set time (completed)

I want the user to have the option to enrol and pay for single / multiple / all weeks.  The single and multiple with no discount whereas the purchase all option would receive a discount. Eg £25/ session but £200 for all.

I can set up sinlge and multi and that gives decent user experience and sepately i can set up the buy all BUT this sets them up as two different classes at the same time so from the interanl class giver perspective its not clear and obviosly therefore clear opportunity for over capacity purchasing.

So how can i add a "buy all" option with discounted purchase price.

Thanks in anticipation