Hello - I am trying to create a pricing structure for my shop that enables someone to pre-purchase at a discount for future usage. I am renting out products and would like to offer buy 3 credits for X discounted amount. Regular pricing is $50 but if they buy 3 credits, the price is $125. Upon purchasing, the buyer would not use all 3 right away so it doesn’t seem like traditional bundles would work. Any thoughts on what I could use to accomplish this?