Multiple Choice Product Form

[gianlucacsfo]

Hi, can you help me? I have Prestasho 1.4.4.0

 

I have to sell a "package" of training courses so that those who buy the package will have an attractive price.

 

Each course package entitles you to a number of "credits" which varies from 1 to 3

 

I put the package that includes 15 credits for sale but the sum of all the courses on this site well over 15 credits.

 

I need that the customer can choose individual courses to put in the package until it reaches 15 credits and no later than (and not least of course)?

 

I need that buying the package of 15 credits, a form appeared with a variety of courses (and related credits) to choose from and that the system automatically calculate the credits up to a maximum of 15 depending on the customer's choice.