Pricing Rule - Packages

Hi all,

Quick question - 

Within pricing rules particularly product volumes is there a way of forcing customers to purchase a set number of productions rather than performances (other than using Fixed packages) ? 

I.e. If we wanted to say customers had to buy a ticket for:

Production 1

Production 2

Production 3 

All setup as separate production seasons - rather than leaving it open to say I could buy for Production 1, performances 1-2-3 and receive a discount? 

Thanks :)