Implement a shopping cart feature for a summit that displays all available Masterclasses (MCs). Allow users to select individual MCs, and introduce dynamic messaging based on the number of MCs added:

Pre-event/During Event Offer: When users add 2 MCs to their cart, display a message offering access to the entire summit for $89. Highlight that this is a better deal than purchasing 2 MCs at $59 each and emphasize the reduced price available before or during the event.

Post-event Offer: When users add 3 MCs to their cart after the event, display a message offering access to the entire summit for $xxx (a higher price than the pre-event offer but still less than the cost of purchasing 3 MCs at $59 each).