Can we sell a combination package at a discounted price?

[yoyoman]

I'm setting up a store that sells prescription snorkeling masks. The user can buy the mask w/o special lenses for a set price, and then add lenses as accessories. A user can also come back later and just buy lenses as an upgrade.

To offer an incentive to buy a mask + 2 lenses, can I set up a package deal? If so, how would I do it? This would be a no brainer if everyone wanted to buy the exact same mask color and had the same prescription. Alas, that's not the case ... each lens has 8 possible strength values, plus there is a left and right lense. Add the mask colors and that's a ton of combos.

Any ideas?