How do we calculate conversion rate and revenue?

On the Metrics page you can find Conversion rate and Revenue values.

How does that calculated?

When your customers add products to cart directly from Quiz result page and make a purchase - those products prices will be added as a Revenue.
Revenue - is a real orders value generated by your Quiz. No magic numbers, what you see is what you get!

Conversion rate is calculated by dividing Quiz completions number on total orders created.