Many thanks Chris...Here I realize I have to learn a lot before being able yo proceed...I would like to calculate results with formula, depending on answers filled in the editbox:
e.g: answer:2, formula: 2x 15€ (fix amount) = 30 € (30€ is the result when typing "2")
Should I ask directly to Naval (and how)? or can you help?
In any case thank you in advance

christian