I have a client that wants to be able to:

Optional feature: If possible, we would like a "total feature" to include an "up sell". In other words, if their total is $4,700, and a list of benefits is shown that they will receive for that amount - I would like a second figure to be displayed saying "for an additional commitment of $700.00, you can receive these additional benefits (and those would be displayed).

they are selling sponsorship if that help not a physical product.

Is this possible with Zen cart? Do i need a certain mod?

Thanks for any help you can give.
mark